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 hematocrit values in pregnant women ( n =5495) attending Patan Hospital, Kathmandu for the first antenatal visit in the 2‐year period from January 1994 until December 1995. In a sub‐sample of subjects ( n =2706), additional information was obtained through interviews and clinical examinations. Logistic regression models were used to analyze data. Results : Mean hematocrit values recorded in the monsoon period were significantly lower than hematocrit values recorded in the winter. The prevalence of moderate (hematocrit 25–33%) and severe (hematocrit<25%) anemia was highest in September. Conclusions : We found a clear seasonal variation in risk of anemia, which was associated with rainfall and temperature. The monsoon seems to be a period when interventions may give the most beneficial effects.