Figure. Box plot analysis for enzyme immunoassay (EIA) values, by populations. X axis represents EIA scores for study participants.Vertical line in each box represents the median for each population. The left and right borders of each box are the 25th and 75th percentiles of each population, respectively. The extensions beyond each box represent the lowest and highest values for each population. Panel A demonstrates the results for each population; panel B demonstrates the results by age.