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Article |

Sleep Problems in Children With Prenatal Substance Exposure:  The Maternal Lifestyle Study FREE

Kristen C. Stone, PhD; Linda L. LaGasse, PhD; Barry M. Lester, PhD; Seetha Shankaran, MD; Henrietta S. Bada, MD; Charles R. Bauer, MD; Jane A. Hammond, PhD
[+] Author Affiliations

Author Affiliations: Brown Center for the Study of Children at Risk, Women and Infants Hospital, Providence, Rhode Island (Drs Stone, LaGasse, and Lester); Department of Pediatrics, Wayne State University School of Medicine, Detroit, Michigan (Dr Shankaran); Department of Pediatrics, University of Kentucky College of Medicine, Lexington (Dr Bada); Department of Pediatrics, University of Miami, Miami, Florida (Dr Bauer); and RTI International, Rockville, Maryland (Dr Hammond).


Arch Pediatr Adolesc Med. 2010;164(5):452-456. doi:10.1001/archpediatrics.2010.52.
Text Size: A A A
Published online

Objective  To examine the associations between sleep problems and prenatal exposure to cocaine, opiates, marijuana, alcohol, and nicotine in children aged 1 month to 12 years.

Design  Sleep data were collected by maternal report in a prospective longitudinal follow-up of children participating in the Maternal Lifestyle multisite study.

Setting  Hospital-based research centers in Providence, Rhode Island; Miami, Florida; Detroit, Michigan; and Memphis, Tennessee.

Participants  There were 808 participants, 374 exposed to cocaine and/or opiates, and 434 comparison subjects.

Main Exposure  Prenatal cocaine, opiate, marijuana, alcohol, and/or nicotine exposure.

Outcome Measure  Sleep problems in early, middle, and/or late childhood, assessed as composites of maternal report items.

Results  Of the 5 substances, prenatal nicotine exposure was the only unique predictor of sleep problems (B = 0.074, R2 change = 0.008, P = .01), with adjustment for covariates, including socioeconomic status, marital status, physical abuse, prenatal medical care, and postnatal cigarette smoke exposure.

Conclusions  Prenatal exposure to nicotine was positively associated with children's sleep problems persisting throughout the first 12 years of life. Targeting of this group of children for educational and behavioral efforts to prevent and treat sleep problems is merited given that good sleep may serve as a protective factor for other developmental outcomes.

Sleep problems in children are associated with daytime impairment, including altered psychomotor performance,1 behavioral disturbance,2 sleepiness,3,4 decreased physical activity and social interest,4 memory and learning deficits,5 and substance use.6 The role of sleep in the development of children with prenatal drug exposure, however, is not well understood. Sleep studies with prenatally exposed children have been limited almost entirely to infancy. Observable decrements in sleep duration and continuity and in sleep-state organization have been found in infants with prenatal cocaine exposure710 and, more recently, in infants with prenatal exposure to alcohol11 and nicotine.11,12 In addition, differences in electroencephalographic sleep patterns between exposed and unexposed infants have been demonstrated in studies of prenatal exposure to opiates,13 alcohol,14 and nicotine.15

Until recently, there were no longitudinal sleep studies of prenatal exposure to cocaine, opiates, alcohol, or nicotine. One study in 3-year-old children found more disrupted sleep to be associated with prenatal exposure to marijuana.16 Furthermore, an association between sleep problems through 9 years of age and prenatal nicotine exposure has been documented in a small Maternal Lifestyle Study sample (n = 139),17 meriting a larger study with better control of covariates and more power to investigate level of prenatal exposure. The aim of the current study, therefore, was to investigate the effects of prenatal exposure (including level of exposure) to cocaine, opiates, marijuana, nicotine, and alcohol on sleep problems over time (1 month to 12 years) in a large sample of children (n = 808).

STUDY DESIGN

The Maternal Lifestyle Study is a multisite longitudinal investigation of the developmental effects of prenatal exposure to cocaine and other drugs.1820 The Maternal Lifestyle Study enrolled 1388 children at birth from 1993 to 1995 and was approved by an appropriate institutional review board at each of its 4 sites (Wayne State University, Detroit, Michigan; University of Tennessee at Memphis, Memphis, Tennessee; University of Miami, Miami, Florida; and Brown University, Providence, Rhode Island).21 Confidentiality regarding the participants' drug use was assured through each center's National Institute on Drug Abuse certificate of confidentiality.

Mothers were recruited in the hospital after delivery and informed consent was obtained at that time. All women delivering very-low-birth-weight newborns (ie, 501-1500 g) were approached to maximize likelihood of recruiting participants who either had prenatal cocaine exposure or were appropriate group-matched controls. During normal business hours, other mothers (ie, those delivering newborns >1500 g) were also approached. Mothers were eligible if they were aged 18 years or older and did not have psychiatric disorders, developmental delays, or language barriers. Neonates were eligible if they were inborn, likely to survive, a singleton, and were born before 43 weeks' gestation. Mother-infant dyads were excluded from the study, starting with the 1-month visit, if the infant had a chromosomal abnormality or toxoplasmosis, rubella, cytomegalovirus, herpes, or syphilis infection or if the mother planned to move out of the catchment area. Comparison participants were matched on ethnicity (black, white, Hispanic, and other), sex, and gestational age. Another match was generated when an infant in the comparison group did not attend the 1-month visit. It was not always possible, however, to replace exposed infants who withdrew, which yielded uneven groups: 658 in the cocaine or opiate–exposed group and 730 in the comparison group.

PARTICIPANTS

Mothers were assigned to the cocaine/opiate exposure group based on either maternal report and/or meconium toxicology with gas chromatography–mass spectroscopy assay confirmation. To be assigned to the comparison group, participants who denied cocaine or opiate use during pregnancy also had to have negative meconium toxicology results. The same procedure was followed for identification of marijuana exposure. Alcohol and tobacco use were assessed by maternal report alone. Level (ie, amount) of prenatal exposure to each of those 5 substances (cocaine, opiates, marijuana, alcohol, and nicotine) was determined at the 1-month visit using the Maternal Interview of Substance Use, which provides information about the frequency (eg, number of times used cocaine each week) and quantity (ie, number of cigarettes, joints, or ounces of alcohol used or consumed each day) of substance use during pregnancy. To be eligible for the current study, participants must have completed more than half of all the sleep measures administered from 1 month to 12 years. Eight hundred eight participants were eligible (374 exposed to cocaine and/or opiates and 434 comparison subjects), which is the final sample for this study.

DEMOGRAPHIC AND MATERNAL MEASURES

At the 1-month visit, self-report information about prenatal care, maternal age, marital status, education level, socioeconomic status (SES), and poverty status was gathered. The Caretaker Inventory of Substance Use was used at yearly visits to assess level of postnatal use of each of the 5 substances since pregnancy. Furthermore, questionnaires assessed the number of caretaker changes (number of times the child changed caregivers during the 12-year period); child abuse (yes or no each year, defined by medical examination findings suggestive of physical or sexual abuse or removal of the child from the home owing to suspicion or verification of physical or sexual abuse); and domestic violence, including physical and sexual abuse experienced by the caretaker (yes or no, years 5-12).

SLEEP MEASURES

The sleep problems index was created to measure global sleep difficulties, particularly difficulties falling or staying sleep, in our sample across the first 12 years of life using sleep items on the 4 pediatric questionnaires described below. All items within 3 periods (1 month to 4 years, 5-8 years, and 9-12 years) were summed for 3 age-relative indexes of sleep problems. We then computed a total sleep problems index summing all 45 items from 1 month to 12 years. Our sleep problems indexes were prorated for missing items. That is, we accounted for missing data by multiplying the mean of the items that were present by the total number of possible items. Other studies have created a composite score from questionnaires, such as the Child Behavior Checklist,22,23 with adequate internal consistency (α = 0.64).22 The Cronbach α for the sleep problems index at each period for our study was 0.64, 0.74, and 0.8, respectively. The Cronbach α for the overall sleep problems index was 0.88.

The Child Behavior Checklist24 was administered at the 3-, 5-, 7-, 9-, and 11-year assessments. This standardized parent-reported questionnaire identifies behavioral and emotional problems of children during the past 6 months and includes the following sleep-related items: having problems sleeping at night, having trouble getting to sleep, talking in one's sleep, crying in one's sleep, sleepwalking, waking up often at night, and sleeping less than or more than most. The child was assigned 1 point for each item the parent endorsed. The Child Health and Illness Profile was administered at years 10 to 12. This validated questionnaire25 assesses children's health and well-being and includes 1 item assessing “trouble falling asleep.” If endorsed, the child was assigned 1 point. The child was also assigned 1 point if the parent endorsed “trouble sleeping” on the Pediatric Symptom Checklist, which was administered at years 8 to 12. The Pediatric Symptom Checklist is a 35-item psychosocial screener for cognitive, behavioral, and emotional problems.26 A general health questionnaire administered yearly contained the following sleep items: problems with sleeping, falling asleep at an unreasonable time, waking at night and requiring attention, being medicated for insomnia, and sleep disorder diagnosis. The child was assigned 1 point for each item the parent endorsed.

STATISTICAL ANALYSIS

A χ2 test or t test was used to compare sample characteristics of attrition (Table 1) and exposure (Table 2) groups. Analysis of variance was used to compare the cocaine or opiate exposure group to the comparison group on the overall sleep problems index.

Table Graphic Jump LocationTable 1. Sample Characteristics by Attrition
Table Graphic Jump LocationTable 2. Sample Characteristics by Original Maternal Lifestyle Study Exposure Groups

A 2-step approach was used to determine which of the 5 substances (cocaine, opiates, marijuana, alcohol, and/or nicotine) were significant predictors of sleep problems. In step 1, all 5 substances were entered together in a regression model to determine which of the substances reached significance (P < .05), which would suggest an association with sleep problems unadjusted for covariates. Step 2 controlled for covariates using hierarchical linear regressions performed with the significant substances from step 1. From the candidate variables listed in Table 2, SES, marital status, abuse (physical or sexual [yes or no]), and prenatal medical care (yes or no) were selected as covariates, having met the following criteria: (1) differed significantly between exposure groups, (2) were associated with the overall sleep index at P < .2, and (3) were not highly correlated with other covariates (r>.7). Additionally, study site and postnatal cigarette smoke exposure were included as covariates, having been selected a priori. Pearson correlations were used to investigate the association between early and later sleep problems.

When comparing participants in the 12-year follow-up (those included in this study) with those not in the 12-year follow-up (Table 1), children in the 12-year follow-up were more likely to be a racial minority (African American, Hispanic, or other) and had more caretaker changes over time. Mothers or caregivers in this study were less likely to use marijuana prenatally and more likely to use cocaine, marijuana, and/or alcohol postnatally. There were no significant differences on newborn medical characteristics (prematurity, birth weight, length at birth, head circumference at birth, and sex). There were no significant differences in level (amount) of postnatal substance use (cocaine, opiates, marijuana, alcohol, or nicotine) among the 2 attrition groups.

There were also differences between the 2 exposure groups (Table 2). Compared with mothers who did not use cocaine during pregnancy, mothers in the exposed group were more likely to be of a low SES, more likely to be older, less likely to be married, less likely to have at least a high school education, and less likely to have had any prenatal care. Furthermore, mothers and caregivers in the exposed group were more likely to use substances (cocaine, opiates, marijuana, alcohol, or nicotine) both prenatally and postnatally. Children in the exposed group were more likely to have been physically or sexually abused and had more caretaker changes over time than children in the comparison group.

In the unadjusted analysis among the 5 substances, prenatal nicotine exposure was the only significant predictor of sleep problems (β = .168, P < .001). Importantly, multicollinearity was not a problem, as evidenced by tolerance remaining above 0.7 and the variance inflation factor remaining between 1 and 2. None of the prenatal exposure variables were highly correlated with each other (all r < 0.4). When adjusted for covariates (SES, marital status, physical or sexual abuse, prenatal care, clinic site, and postnatal cigarette smoke exposure), the effect of prenatal nicotine exposure predicting more sleep problems on the sleep problems index was still statistically significantly (unstandardized coefficient [B] = 0.074, R2 = 0.067, R2 change = 0.008, P = .01). Higher levels of prenatal exposure to nicotine predicted more sleep problems. Specifically, after controlling for covariates, each additional cigarette smoked per day during a pregnancy was associated with a 0.074 increase in the child's index score of sleep problems. Increases in this score indicate more difficulty falling and staying asleep from 1 month to 12 years.

In a separately tested model, postnatal cigarette smoke exposure was no longer significant when entered into a regression model after prenatal nicotine exposure and covariates; that is, it did not explain sleep problems above and beyond prenatal nicotine exposure and the other covariates.

The main finding from this study was that in a large sample of children with prenatal exposure to cocaine, opiates, marijuana, alcohol, and/or nicotine there is a unique effect on sleep problems between 1 month and 12 years for nicotine in both unadjusted and adjusted analyses. This was a dose-response effect for prenatal nicotine exposure with adjustment for covariates. Higher levels of prenatal nicotine exposure predicted more sleep problems, specifically difficulty falling and staying asleep from 1 month to 12 years. This effect was observed controlling for postnatal maternal/caregiver use of cigarettes.

The finding that prenatal nicotine exposure predicted sleep problems in children is consistent with studies of smokers showing sleep disruption attributable to nicotine27,28 and supports a recent study that found that prenatal maternal smoking resulted in less sleep and more fragmented sleep among newborns.12 Preclinical studies of prenatal nicotine exposure have shown abnormal cardiorespiratory response during sleep,29 altered sleep-state maturation,30 and decreased rapid eye movement (REM) sleep.31 A recent study documented significantly less sleep in infants after drinking breast milk that contained nicotine than after drinking nicotine-free breast milk (53 vs 85 minutes).32

There are several ways through which nicotine can affect sleep. Nicotine has been shown to excite pedunculopontine nucleus cells, which are involved in sleep-wake mechanisms31; to suppress pontogeniculooccipital spike activity, which influences the initiation and maintenance of REM sleep33; and to inhibit sleep-promoting neurons in the ventrolateral preoptic area.34

When investigating prenatal exposure to cocaine, opiates, marijuana, alcohol, and nicotine, we found dose-response effects of prenatal nicotine exposure only on sleep problems in a large sample of children aged up to 12 years. Caution should be taken when concluding that prenatal nicotine exposure is more damaging to sleep than other prenatal drug exposure, given the current study's specific limitations (namely the subjectivity of the sleep problems index) and the study's operationalization of “sleep problems” (ie, difficulty falling and staying asleep). Whether or not there are associations between prenatal drug exposure and other types of sleep problems (eg, sleep-disordered breathing) is unknown and was not investigated in this study. Our study is also limited by the use of maternal self-report for our measures both of sleep problems in the children and of caregiver postnatal substance use. Validated parent-reported sleep problems questionnaires would have been preferable to our index composed of items from the Child Behavior Checklist, the Child Health and Illness Profile, Pediatric Symptom Checklist, and general health questionnaire. To our knowledge, this type of validated instrument does not yet exist to measure sleep during the first 12 years of life or pediatric difficulties falling and staying asleep specifically, and therefore this limitation points to an important need in the field. Furthermore, it would be useful to conduct formal sleep studies on these children and validate environmental tobacco exposure and postnatal substance use with toxicological assays.

This is the first longitudinal study of the effects of prenatal drug exposure on sleep problems over time with adjustment for multiple covariates (SES, marital status, physical or sexual abuse, prenatal care, clinic site, and postnatal cigarette smoke exposure) and with adequate power to detect a dose-response association. Findings suggest a link between prenatal nicotine exposure and persisting sleep problems in children for the first 12 years of life. Understanding the persisting nature of sleep problems in children with prenatal adversity, including substance exposure, could be a critical component to improving developmental outcomes in this population. Sleep problems may mediate some of the other developmental effects of prenatal exposure to nicotine. Assessing the risk for sleep problems in children with prenatal exposure to nicotine and other drugs is the first step toward creating efficient, proactive services that will foster optimal sleep and corresponding daytime functioning.

Correspondence: Kristen C. Stone, PhD, Brown Center for the Study of Children at Risk, Women and Infants Hospital, 101 Dudley St, Providence, RI 02905 (kristen_stone@brown.edu).

Accepted for Publication: January 26, 2010.

Author Contributions: Dr Stone had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Stone and Lester. Acquisition of data: LaGasse, Lester, Shankaran, Bada, Bauer, and Hammond. Analysis and interpretation of data: Stone and Lester. Drafting of the manuscript: Stone, LaGasse, and Lester. Critical revision of the manuscript for important intellectual content: Stone, Lester, Shankaran, Bada, Bauer, and Hammond. Statistical analysis: Stone and Lester. Obtained funding: LaGasse, Lester, and Shankaran. Administrative, technical, and material support: Lester and Hammond.

Financial Disclosure: None reported.

Funding/Support: This study was supported by the Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network and an interinstitute agreement with the National Institute on Drug Abuse through cooperative agreements U10 DA 024119-01, U10 HD 27904 (Dr Lester), U10 DA 024117-01, U10 HD 21385 (Dr Shankaran), U10 DA 024128-06, U10 HD 27856 (Dr Bada), U10-DA-024118-01, and U10-HD-21397 (Dr Bauer); and Child Health and Human Development contract N01-HD-2-3159 (Dr Lester).

Anders  TFKeener  MAKraemer  H Sleep-wake state organization, neonatal assessment and development in premature infants during the first year of life, II. Sleep 1985;8 (3) 193- 206
PubMed
Thoman  EBDenenberg  VHSievel  JZeidner  LPBecker  P State organization in neonates: developmental inconsistency indicates risk for developmental dysfunction. Neuropediatrics 1981;12 (1) 45- 54
PubMed
Carskadon  MA The second decade. Guilleminault  CDisorders of Sleeping and Waking: Indications and Techniques. Menlo Park, CA Addison Wesley1982;99- 125
Carskadon  MAHarvey  KDuke  PAnders  TFLitt  IFDement  WC Pubertal changes in daytime sleepiness. Sleep 1980;2 (4) 453- 460
PubMed
Carskadon  MAAcebo  CJenni  OG Regulation of adolescent sleep: implications for behavior. Ann N Y Acad Sci 2004;1021276- 291
PubMed
Carskadon  MA Patterns of sleep and sleepiness in adolescents. Pediatrician 1990;17 (1) 5- 12
DiPietro  JASuess  PEWheeler  JSSmouse  PHNewlin  DB Reactivity and regulation in cocaine-exposed neonates. Infant Behav Dev 1995;18 (4) 407- 414
Gingras  JLFeibel  JBDalley  LBMuelenaer  AKnight  CG Maternal polydrug use including cocaine and postnatal infant sleep architecture: preliminary observations and implications for respiratory control and behavior. Early Hum Dev 1995;43 (3) 197- 204
PubMed
Regalado  MGSchechtman  VLDel Angel  APBean  XD Sleep disorganization in cocaine-exposed neonates. Infant Behav Dev 1995;18 (3) 319- 327
Regalado  MGSchechtman  VLDel Angel  APBean  XD Cardiac and respiratory patterns during sleep in cocaine-exposed neonates. Early Hum Dev 1996;44 (3) 187- 200
PubMed
Troese  MFukumizu  MSallinen  BJ  et al.  Sleep fragmentation and evidence for sleep debt in alcohol-exposed infants. Early Hum Dev 2008;84 (9) 577- 585
PubMed
Stéphan-Blanchard  ETelliez  FLeke  A  et al.  The influence of in utero exposure to smoking on sleep patterns in preterm neonates. Sleep 2008;31 (12) 1683- 1689
PubMed
Hutchings  DE Methadone and heroin during pregnancy: a review of behavioral effects in human and animal offspring. Neurobehav Toxicol Teratol 1982;4 (4) 429- 434
PubMed
Chiriboga  CA Fetal effects. Neurol Clin 1993;11 (3) 707- 728
PubMed
Pichini  SGarcia-Algar  O In utero exposure to smoking and newborn neurobehavior: how to assess neonatal withdrawal syndrome? Ther Drug Monit 2006;28 (3) 288- 290
PubMed
Dahl  REScher  MSWilliamson  DERobles  NDay  N A longitudinal study of prenatal marijuana use: effects on sleep and arousal at age 3 years. Arch Pediatr Adolesc Med 1995;149 (2) 145- 150
PubMed
Stone  KCHigh  PCMiller-Loncar  CLLaGasse  LLLester  BM Longitudinal study of maternal report of sleep problems in children with prenatal exposure to cocaine and other drugs. Behav Sleep Med 2009;7 (4) 196- 207
PubMed
Bada  HSDas  ABauer  CR  et al.  Gestational cocaine exposure and intrauterine growth: maternal lifestyle study. Obstet Gynecol 2002;100 (5, pt 1) 916- 924
PubMed
Bauer  CRLanger  JCShankaran  S  et al.  Acute neonatal effects of cocaine exposure during pregnancy. Arch Pediatr Adolesc Med 2005;159 (9) 824- 834
PubMed
Lester  BMEl Sohly  MWright  LL  et al.  The Maternal Lifestyle Study: drug use by meconium toxicology and maternal self-report. Pediatrics 2001;107 (2) 309- 317
PubMed
Lester  BMTronick  EZLaGasse  L  et al.  The Maternal Lifestyle Study: effects of substance exposure during pregnancy on neurodevelopmental outcome in 1-month-old infants. Pediatrics 2002;110 (6) 1182- 1192
PubMed
Alfano  CAGinsburg  GKingery  J Sleep-related problems among children and adolescents with anxiety disorders. J Am Acad Child Adolesc Psychiatry 2007;46 (2) 224- 232
PubMed
Storch  EAMurphy  TKLack  CWGeffken  GRJacob  MLGoodman  WK Sleep-related problems in pediatric obsessive-compulsive disorder. J Anxiety Disord 2008;22 (5) 877- 885
PubMed
Achenbach  TM Manual for the Child Behavior Checklist/4-18.  Burlington University of Vermont1991;
Starfield  BBergner  MEnsminger  M  et al.  Adolescent health status measurement: development of the Child Health and Illness Profile. Pediatrics 1993;91 (2) 430- 435
PubMed
Jellinek  MSMurphy  JMRobinson  JFeins  ALamb  SFenton  T Pediatric Symptom Checklist: screening school-age children for psychosocial dysfunction. J Pediatr 1988;112 (2) 201- 209
PubMed
Patten  CAChoi  WSGillin  JCPierce  JP Depressive symptoms and cigarette smoking predict development and persistence of sleep problems in US adolescents. Pediatrics 2000;106 (2) E23
PubMed
Zhang  LSamet  JCaffo  BPunjabi  NM Cigarette smoking and nocturnal sleep architecture. Am J Epidemiol 2006;164 (6) 529- 537
PubMed
Hafström  OMilerad  JSundell  HW Prenatal nicotine exposure blunts the cardiorespiratory response to hypoxia in lambs. Am J Respir Crit Care Med 2002;166 (12, pt 1) 1544- 1549
PubMed
Frank  MGSrere  HLedezma  CO'Hara  BHeller  HC Prenatal nicotine alters vigilance states and AchR gene expression in the neonatal rat: implications for SIDS. Am J Physiol Regul Integr Comp Physiol 2001;280 (4) R1134- R1140
PubMed
Garcia-Rill  EBuchanan  R McKeon  KSkinner  RDWallace  T Smoking during pregnancy: postnatal effects on arousal and attentional brain systems. Neurotoxicology 2007;28 (5) 915- 923
PubMed
Mennella  JAYourshaw  LMMorgan  LK Breastfeeding and smoking: short-term effects on infant feeding and sleep. Pediatrics 2007;120 (3) 497- 502
PubMed
Vazquez  JGuzman-Marin  RSalin-Pascual  RJDrucker-Colin  R Transdermal nicotine on sleep and PGO spikes. Brain Res 1996;737 (1-2) 317- 320
PubMed
Saint-Mleux  BEggermann  EBisetti  A  et al.  Nicotinic enhancement of the noradrenergic inhibition of sleep-promoting neurons in the ventrolateral preoptic area. J Neurosci 2004;24 (1) 63- 67
PubMed

Figures

Tables

Table Graphic Jump LocationTable 1. Sample Characteristics by Attrition
Table Graphic Jump LocationTable 2. Sample Characteristics by Original Maternal Lifestyle Study Exposure Groups

References

Anders  TFKeener  MAKraemer  H Sleep-wake state organization, neonatal assessment and development in premature infants during the first year of life, II. Sleep 1985;8 (3) 193- 206
PubMed
Thoman  EBDenenberg  VHSievel  JZeidner  LPBecker  P State organization in neonates: developmental inconsistency indicates risk for developmental dysfunction. Neuropediatrics 1981;12 (1) 45- 54
PubMed
Carskadon  MA The second decade. Guilleminault  CDisorders of Sleeping and Waking: Indications and Techniques. Menlo Park, CA Addison Wesley1982;99- 125
Carskadon  MAHarvey  KDuke  PAnders  TFLitt  IFDement  WC Pubertal changes in daytime sleepiness. Sleep 1980;2 (4) 453- 460
PubMed
Carskadon  MAAcebo  CJenni  OG Regulation of adolescent sleep: implications for behavior. Ann N Y Acad Sci 2004;1021276- 291
PubMed
Carskadon  MA Patterns of sleep and sleepiness in adolescents. Pediatrician 1990;17 (1) 5- 12
DiPietro  JASuess  PEWheeler  JSSmouse  PHNewlin  DB Reactivity and regulation in cocaine-exposed neonates. Infant Behav Dev 1995;18 (4) 407- 414
Gingras  JLFeibel  JBDalley  LBMuelenaer  AKnight  CG Maternal polydrug use including cocaine and postnatal infant sleep architecture: preliminary observations and implications for respiratory control and behavior. Early Hum Dev 1995;43 (3) 197- 204
PubMed
Regalado  MGSchechtman  VLDel Angel  APBean  XD Sleep disorganization in cocaine-exposed neonates. Infant Behav Dev 1995;18 (3) 319- 327
Regalado  MGSchechtman  VLDel Angel  APBean  XD Cardiac and respiratory patterns during sleep in cocaine-exposed neonates. Early Hum Dev 1996;44 (3) 187- 200
PubMed
Troese  MFukumizu  MSallinen  BJ  et al.  Sleep fragmentation and evidence for sleep debt in alcohol-exposed infants. Early Hum Dev 2008;84 (9) 577- 585
PubMed
Stéphan-Blanchard  ETelliez  FLeke  A  et al.  The influence of in utero exposure to smoking on sleep patterns in preterm neonates. Sleep 2008;31 (12) 1683- 1689
PubMed
Hutchings  DE Methadone and heroin during pregnancy: a review of behavioral effects in human and animal offspring. Neurobehav Toxicol Teratol 1982;4 (4) 429- 434
PubMed
Chiriboga  CA Fetal effects. Neurol Clin 1993;11 (3) 707- 728
PubMed
Pichini  SGarcia-Algar  O In utero exposure to smoking and newborn neurobehavior: how to assess neonatal withdrawal syndrome? Ther Drug Monit 2006;28 (3) 288- 290
PubMed
Dahl  REScher  MSWilliamson  DERobles  NDay  N A longitudinal study of prenatal marijuana use: effects on sleep and arousal at age 3 years. Arch Pediatr Adolesc Med 1995;149 (2) 145- 150
PubMed
Stone  KCHigh  PCMiller-Loncar  CLLaGasse  LLLester  BM Longitudinal study of maternal report of sleep problems in children with prenatal exposure to cocaine and other drugs. Behav Sleep Med 2009;7 (4) 196- 207
PubMed
Bada  HSDas  ABauer  CR  et al.  Gestational cocaine exposure and intrauterine growth: maternal lifestyle study. Obstet Gynecol 2002;100 (5, pt 1) 916- 924
PubMed
Bauer  CRLanger  JCShankaran  S  et al.  Acute neonatal effects of cocaine exposure during pregnancy. Arch Pediatr Adolesc Med 2005;159 (9) 824- 834
PubMed
Lester  BMEl Sohly  MWright  LL  et al.  The Maternal Lifestyle Study: drug use by meconium toxicology and maternal self-report. Pediatrics 2001;107 (2) 309- 317
PubMed
Lester  BMTronick  EZLaGasse  L  et al.  The Maternal Lifestyle Study: effects of substance exposure during pregnancy on neurodevelopmental outcome in 1-month-old infants. Pediatrics 2002;110 (6) 1182- 1192
PubMed
Alfano  CAGinsburg  GKingery  J Sleep-related problems among children and adolescents with anxiety disorders. J Am Acad Child Adolesc Psychiatry 2007;46 (2) 224- 232
PubMed
Storch  EAMurphy  TKLack  CWGeffken  GRJacob  MLGoodman  WK Sleep-related problems in pediatric obsessive-compulsive disorder. J Anxiety Disord 2008;22 (5) 877- 885
PubMed
Achenbach  TM Manual for the Child Behavior Checklist/4-18.  Burlington University of Vermont1991;
Starfield  BBergner  MEnsminger  M  et al.  Adolescent health status measurement: development of the Child Health and Illness Profile. Pediatrics 1993;91 (2) 430- 435
PubMed
Jellinek  MSMurphy  JMRobinson  JFeins  ALamb  SFenton  T Pediatric Symptom Checklist: screening school-age children for psychosocial dysfunction. J Pediatr 1988;112 (2) 201- 209
PubMed
Patten  CAChoi  WSGillin  JCPierce  JP Depressive symptoms and cigarette smoking predict development and persistence of sleep problems in US adolescents. Pediatrics 2000;106 (2) E23
PubMed
Zhang  LSamet  JCaffo  BPunjabi  NM Cigarette smoking and nocturnal sleep architecture. Am J Epidemiol 2006;164 (6) 529- 537
PubMed
Hafström  OMilerad  JSundell  HW Prenatal nicotine exposure blunts the cardiorespiratory response to hypoxia in lambs. Am J Respir Crit Care Med 2002;166 (12, pt 1) 1544- 1549
PubMed
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