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Table 3 The results of automated item selection procedure for the K6

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

   Item numbers
c Results Scale 1 Scale 2 Unscalable
0–0.55 1: 6 1–6   
0.6 2:3,3 1–3 4–6  
0.65 2:2, 2 2, 3 4, 6 1,5
0.7–0.75 0    1–6