Socio-demographic and Parasitological Characteristics of Study Sample (N = 507) - Crude Associations with Anemia and Prevalence of Anemia within Co-infection Categories.

*Total Sample could differ within strata as a function of missing data.†Anemia defined as Hemoglobin levels‡Tanner stage is a measure of sexual maturity, with higher numbers reflecting greater sexual maturity. Range: 1–4.5.§Nutritional status defined by Z-scores using American children as reference population based on 1976 NCHS data. Normal = z-score >−1, mild: −2**M+ -includes moderate and high intensity infection burdens collapsed into one category.††The prevalence of anemia by ascaris intensity was 23.8%, 19.5% and 18.8% for low and M+ ascaris intensity infections respectively.‡‡For any pair of helminths, the category “M+ intensity infection only” includes children infected at M+ intensity with only one of the two species (e.g. S. japonicum) while the other infection is either completely absent or present only at low intensity.§§The reference group for any pair of helminth co-infections is defined to include the following: a) children uninfected by either species and b) children infected by only 1 of the species at low intensity.