STUDY OBJECTIVE To examine the extent to which socioeconomic status, mental health, and substance use are associated with teenage pregnancies in Southwestern Ontario (SWO), and whether these pregnancies are at an elevated risk for adverse birth outcomes, after controlling for medical, behavioral, and socioeconomic status factors. DESIGN Retrospective cohort study using perinatal and neonatal databases. SETTING Tertiary care hospital in SWO. PARTICIPANTS Women residing in SWO who gave birth to singleton infants without congenital anomalies between 2009 and 2014. Teenage pregnancies (19 years of age or younger) were compared with pregnancies of women 20-34 years and 35 years or older. INTERVENTIONS None. MAIN OUTCOME MEASURES Low birth weight (LBW), very LBW, term LBW, preterm birth, very preterm birth, low and very low Apgar score, and fetal macrosomia. RESULTS Of 25,263 pregnant women, 1080 (4.3%) were 19 years of age or younger. Approximately 18% of teenage mothers lived in socioeconomically disadvantaged neighborhoods, compared with 11% of mothers aged 20-34 and 9% of women 35 years of age or older (P < .001). Teenage mothers had higher rates of depression during pregnancy (9.8%) than mothers 20-34 years (5.8%) and those 35 years of age or older (6.8%; P < .001). Young mothers self-reported higher tobacco, marijuana, and alcohol use during pregnancy than adult mothers (P < .001). Teenage pregnancy increased the risk of a low Apgar score (adjusted odds ratio, 1.56; 95% confidence interval, 1.21-2.02), but was not associated with other birth outcomes after adjusting for covariates. CONCLUSION Teenage pregnancy is associated with a higher risk of socioeconomic disadvantage, mental health problems, and substance use during pregnancy, but is largely unrelated to adverse birth outcomes in SWO.

中文翻译：

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与青少年妊娠相关的危险因素和出生结局：加拿大样本。

目的研究在控制了医学，行为，精神疾病，精神疾病，精神疾病，精神疾病，精神疾病和精神疾病之后，西南安大略省（SWO）青少年怀孕与社会经济状况，心理健康和药物使用相关的程度，以及这些妊娠是否有较高的不良分娩结果风险。和社会经济地位因素。设计使用围产期和新生儿数据库进行回顾性队列研究。在SWO中设置三级护理医院。研究对象2009年至2014年间居住在SWO中的妇女生下没有先天性异常的单身婴儿。将少女怀孕（19岁或以下）与20-34岁和35岁以上的妇女进行了比较。干预措施无。主要观察指标低出生体重（LBW），极低出生体重（LBW），足月LBW，早产，极早出生，Apgar得分低和非常低，和胎儿巨大儿。结果在25263名孕妇中，有1080名（4.3％）年龄在19岁以下。约有18％的少女母亲生活在社会经济地位较弱的地区，而20-34岁的母亲中有11％，35岁以上的女性中有9％（P <.001）。十几岁的母亲在怀孕期间的抑郁症患病率（9.8％）高于20-34岁的母亲（5.8％）和35岁及以上的母亲（6.8％； P <.001）。年轻母亲自称怀孕期间的烟草，大麻和酒精使用量高于成年母亲（P <.001）。青少年怀孕会增加Apgar评分低的风险（校正后的优势比为1.56； 95％的置信区间为1.21-2.02），但校正协变量后与其他出生结局无关。