Logistic regression
In women, pica is "most often seen during pregnancy," with estimates of 27.8% of pregnant women experiencing pica, but pica prevalence and manifestation is culturally and geographically heterogenous. A study of pregnant women in Tehran, Iran found pica in 8.33% of the study population with pagophagia accounting for 76% of observed pica cases. Logistic regression showed a positive correlation between pica in pregnancy with pregnancy complications, lower educational attainment, and use of iron supplementation. A study of pica in pregnant Mexican-born women living in either the United States or Mexico found differing rates of pagophagy between the two groups.