Vamos Cheryl A, Flory Sara, Sun Haichun, DeBate Rita, Bleck Jennifer, Thompson Erika, Merrell Laura
Department of Community and Family Health, College of Public Health, University of South Florida, 13201 Bruce B. Downs Blvd. MDC 56, Tampa, FL, 33612, USA,
Matern Child Health J. 2015 Aug;19(8):1775-82. doi: 10.1007/s10995-015-1691-4.
The significant impact of physical activity during, or immediately prior to pregnancy on a range of pregnancy and birth outcomes has been established. However, lifecourse theory posits that the antecedents of poor outcomes occur across a larger trajectory of time. The objective of this study was to examine whether physical activity patterns over the lifecourse impact birth outcomes. The sample (n = 1,713) was derived from Waves I, III, and IV of the National Longitudinal Study of Adolescent Health and limited to women who had their first, singleton live birth between Waves III and IV; respondents who had missing data were excluded. Outcome variables included preterm birth (<37 weeks) and low birth weight (<5.5 pounds). Physical activity was categorized as follows: long-term physically active (active at Waves I and III); short-term physically active (active at only Wave I or III); and not physically active (not active at Waves I and III). Survey-weighted logistic regression controlled for socio-demographic and established predictors of poor birth outcomes. Women categorized as long-term physically active had lower rates of preterm births (12.2 vs. 18.7 %) and low birth weight (9.1 vs. 11.1 %) compared to women categorized as not physically active. However, when controlling for covariates, adjusted analysis revealed that physical activity consistency only predicted preterm birth (aOR = 0.55, 95 % CI = 0.33-0.91). Findings suggest that physical activity patterns across the lifecourse may decrease risk of preterm birth. Implications include efforts supporting patterns of physical activity over longer periods of time prior to pregnancy.
孕期或孕前进行体育活动对一系列妊娠和分娩结局有显著影响，这一点已经得到证实。然而，生命历程理论认为，不良结局的前因发生在更长的时间轨迹上。本研究的目的是探讨生命历程中的体育活动模式是否会影响分娩结局。样本（n = 1713）来自青少年健康全国纵向研究的第一、三、四轮，仅限于在第三轮和第四轮之间首次单胎活产的女性；缺失数据的受访者被排除在外。结局变量包括早产（<37周）和低出生体重（<5.5磅）。体育活动分为以下几类：长期体育活动（在第一轮和第三轮时活跃）；短期体育活动（仅在第一轮或第三轮时活跃）；以及不进行体育活动（在第一轮和第三轮时不活跃）。采用调查加权逻辑回归，对社会人口统计学因素以及已确定的不良分娩结局预测因素进行了控制。与被归类为不进行体育活动的女性相比，被归类为长期进行体育活动的女性早产率（12.2%对18.7%）和低出生体重率（9.1%对11.1%）更低。然而，在控制协变量后，调整分析显示，体育活动的持续性仅能预测早产（调整后的比值比 = 0.55，95%置信区间 = 0.33 - 0.91）。研究结果表明，生命历程中的体育活动模式可能会降低早产风险。这意味着需要在孕前更长时间内努力支持体育活动模式。
