Fig. 2
From: More than blood: app-tracking reveals variability in heavy menstrual bleeding construct
App-tracked vs. reported period lengths. (a) Histograms of reported (upper) and app-tracked (lower) total bleeding days in the most recently completed period [n = 6338]. (b) Histogram of the difference between reported and tracked period length (positive values = overestimation and negative values = underestimation of reported compared to tracked period length)