Seasonal variation in risk of anemia among pregnant Nepali women

Objective: We aimed to investigate whether there is any seasonal variation in risk of anemia among pregnant Nepali women. Methods: We studied the hema tocrit values in pregnant women (n = 5495) attending Patan Hospital, Kathma ndu for the first antenatal visit in the 2-year period from January 1994 un til December 1995. In a sub-sample of subjects (n = 2706), additional infor mation was obtained through interviews and clinical examinations. Logistic regression models were used to analyze data. Results: Mean hematocrit value s recorded in the monsoon period were significantly lower than hematocrit v alues recorded in the winter. The prevalence of moderate (hematocrit 25-33% ) and severe (hematocrit < 25%) anemia was highest in September. Conclusion s: We found a clear seasonal variation in risk of anemia, which was associa ted with rainfall and temperature. The monsoon seems to be a period when in terventions may give the most beneficial effects. (C) 2000 International Fe deration of Gynecology and Obstetrics.