Table 1.

Means and standard deviations of the HADS subscales

	Whole sample	Students	Outpatients
HADS-A
Mean	7.0	6.5	8.3
SD	4.0	3.7	4.4
t (df)	-	7.46 (644)***
Possible cases	451 (31%)	265 (25%)	186 (46%)
Probable cases	211 (14%)	111 (10%)	100 (25%)
HADS-D
Mean	6.5	5.9	8.2
SD	4.1	3.7	4.6
t (df)	-	8.87 (610) ***
Possible cases	425 (29%)	243 (23%)	182 (45%)
Probable cases	173 (12%)	77 (7%)	96 (25%)
Number of samples	1477	1069	408

*** P < 0.001. Possible cases were identified by cut-off point = 8/9; Probable cases were identified by cut-off point = 11/12.