Fig. 3From: Characteristic distribution of the total and individual item scores on the Kessler Screening Scale for Psychological Distress (K6) in US adultsDistributions of the total scores of the 5 items. a Low ratio group (items 1, 3, 4, 5, and 6) and (b) high ratio group (items 1, 2, 3, 4, and 5) on a normal scale. c Low ratio group and (d) high ratio group on a semi-logarithmic scale. The distributions of the total scores of 5 item scores for the two groups were commonly right-skewed (a, b). Using semi-logarithmic scales, the two groups showed linear patterns with similar gradients (c, d)Back to article page