ارتباط عوامل شغلي با وقوع زايمان زودرس

The survey of association between occupational factors and preterm childbirth

Background & Aim: Socio-economical changes have increased the womenʹs opportunity to take joh in recent decades. The increased levels of women in work places, has resulted in a high interest in the potential adverse effects of work on pregnancy outcome, This study was conducted in order to surveying the association hetween occupational Iactors and prererm childbirth. Methods & Materials: It is a cross-sectional study. Samples consisted of nurses and midwives (518 person) who working in Tehranʹs universities of medical sciences hospitals. Also they delivered newborns in gestational age more than twenty weeks (term or prererm) in years 2001-2006. The subjects were selected using a multi stage sampling method. Data gathered using a self-administered questionnaire. Occupational factors labeled as fatigue score and working hours. The relation herween Occupatiunal factors and preterm birth was analyzed using descriptive and infcreruiul statistics (Chisquared, t-tcst and Marin-Whitney U test) hy SPSS software. Results: Based on the study findings, the prevalence of pretenn labor was 17.2% (95%CI=O.14-0.20). Although the proportions uf unfavorable working conditions include: working at acute clinical wards. standing up more than 3h per each working shift, physical exercise. working in cold or hot weather, working in busy environment with conunuous noise. being checker of visual and aural monitoring signals, working hours equal or more than 40 hours per week. and working fatigue score equal or more than 3 were higher in pretenn group; bnt it didnʹt show any significant relation with preterm birth. Conclusion: According to the research findings. it seems tha( occupational factors do not have explicit effect on preterm ehildbirth. Therefore more investigations arc recommended.