Predictors of Miscarriage in the West of Iran: A Case-Control Study

 Since the risk factors for miscarriage vary in different societies, the present study was conducted to investigate the effect of the related factors on miscarriage in the west of Iran (Zanjan city). We aimed to determine the modifiable and non-modifiable predictors of miscarriage.

 In this case-control study, 219 cases and 420 controls were selected among those living in the Zanjan (a city located in western Iran) in 2019. Data were collected by a 25-item checklist of medical records available in the comprehensive urban health service center. For assessing the effects of explanatory variables on miscarriage, the multiple logistic regression model was used at a 95% confidence interval. All analysis was conducted by Stata 14 software. 

 Short birth interval (less than 36 months) (OR=2.4, p<0.001) and ectopic pregnancy (OR=3.5, p<0.011) increase the odds of miscarriage. In other words, high education reduced the odds of miscarriage (OR:0.07,p<0.001).

 In the present study, increasing age, low education level, history of previous coagulation, previous spontaneous abortion, history of previous ectopic pregnancy and short birth intervals (less than 36 month) were associated directly with miscarriage.