Mahmoodi Zohreh, Karimlou Masoud, Sajjadi Homeira, Dejman Masoumeh, Vameghi Meroe, Dolatian Mahrokh, Baradarn Eftekhari Monir
Social Determinant of Health Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, IR Iran.
Department of Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran.
Iran Red Crescent Med J. 2013 Jul;15(7):573-80. doi: 10.5812/ircmj.11665. Epub 2013 Jul 5.
Low birth weight is one of the most important public health issues in developing and developed countries and identifying its etiology is important for prevention.
Considering the unknown impact of physical activity on low birth weight, this research was conducted to investigate the relationship between physical activity and low birth weight.
This research was conducted using a case-control design. The control group was made of 500 women with normal birth weight infants and the case group included 250 women with low birth weight infants from the selected hospitals in city of Tehran. The information was gathered using a researcher-made questionnaire which was prepared for determining the relationship between mothers' lifestyle during pregnancy and infants' low birth weight using social determinants of health approach. In this questionnaire, scope of physical activity was investigated in three groups of athletic activities, activities at home and leisure activities. Activity intensity was determined using MET scale and the data were analyzed in SPSS software using independent t-test, Chi-square and logistic regression.
In the present research, based on the results of multiple logistic regression test, an increase in the time spent on sport activities (OR = 2.20) and home activities (OR =1.44) (P = 0.003) was accompanied by increased chance of giving birth to low birth weight infants; in contrast, one hour increase of leisure activities decreased the probability of low birth weight infants by 0.32 (P = 0.008).
An increase in the time spent on sport and home activities, even after considering other influential factors, was related to low birth weight.
低出生体重是发展中国家和发达国家最重要的公共卫生问题之一，确定其病因对于预防至关重要。
鉴于身体活动对低出生体重的影响尚不清楚，本研究旨在调查身体活动与低出生体重之间的关系。
本研究采用病例对照设计。对照组由500名出生体重正常婴儿的母亲组成，病例组包括250名来自德黑兰市选定医院的低出生体重婴儿的母亲。信息通过研究者自行编制的问卷收集，该问卷旨在利用健康的社会决定因素方法确定孕期母亲生活方式与婴儿低出生体重之间的关系。在这份问卷中，身体活动的范围在体育活动、家庭活动和休闲活动三组中进行了调查。活动强度使用代谢当量量表确定，数据在SPSS软件中使用独立t检验、卡方检验和逻辑回归进行分析。
在本研究中，基于多重逻辑回归测试的结果，体育活动时间（OR = 2.20）和家庭活动时间（OR = 1.44）的增加（P = 0.003）伴随着生出低出生体重婴儿几率的增加；相比之下，休闲活动时间每增加一小时，生出低出生体重婴儿的概率降低0.32（P = 0.008）。
即使在考虑其他影响因素之后，体育活动和家庭活动时间的增加仍与低出生体重有关。
