Table 2.

Mean±SD scores of the GHQ-28 subscales in the three age groups

GHQ-28 subscales	Elderly (n=155)	Middle-aged adults (n=530)	Young adults (n=1574)	P value
Somatic symptoms	6.8±4.5	5.78±3.8	5.4±3.7	<0.001
Anxiety	5.8±4.5	5.2±4.4	4.9±4.2	0.030
Social dysfunction	7.6±2.8	6.9±2.0	6.7±2.2	<0.001
Depression	2.7±4.1	2.0±3.0	2.1±3.2	0.050
Total score	22.9±13.5	19.9±10.7	19.2±10.9	<0.001