Table 3.

Internal Consistency of the K6 Scores

	n	T1	T2
		Cronbach’s Alpha Coefficient	Cronbach’s Alpha Coefficient
Both sexes	3254	0.94	0.94
20–29	823	0.93	0.93
30–39	811	0.95	0.95
40–49	812	0.95	0.94
50–59	808	0.94	0.94
Male	1627	0.94	0.94
Female	1627	0.94	0.94

Abbreviations: K6, Kessler Psychological Distress Scale; T1, At baseline; T2, At 2-week follow-up.