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Table 2 Descriptive statistics of the items (upper panel) and the scale (lower panel) for the K6

From: A Mokken scale analysis of the Kessler-6 screening measure among Chinese older population: findings from a national survey

Item M SD Hj SE citc
1 0.71 1.01 0.581 0.011 0.72
2 0.52 0.86 0.555 0.011 0.70
3 0.57 0.92 0.590 0.010 0.76
4 0.45 0.88 0.584 0.011 0.74
5 0.72 1.09 0.574 0.010 0.71
6 0.41 0.85 0.592 0.011 0.74
M    3.38   
SD    4.38   
H    579 0.009  
α    0.87   
λ2    0.87   
MS    0.87   
LCRC    0.87   
  1. Note. N = 6450. Hj = item-scalability coefficient; SE = standard error of item scalability coefficient; citc = corrected item-test correlation; H = total-scalability coefficient; α = Cronbach’s alpha; λ2 = Guttman’s lambda-2; MS = Molenaar–Sijtsma method; LCRC = Latent Class Reliability Coefficient