Table 2.

Mean score of each item of GHQ-12 among female sex workers in Guangdong, China.

	Non-depression (n = 311)	Depression (n = 342)	Total (n = 653)
Been able to concentrate on whatever you're doing	0.11	0.11	0.11
Lost much sleep over worry	0.10	0.84	0.49
Felt you were playing a useful part in things	0.09	0.09	0.09
Felt capable of making decisions about things	0.06	0.09	0.08
Felt constantly under strain	0.73	0.93	0.83
Felt you couldn't overcome your difficulties	0.87	0.96	0.91
Been able to enjoy your normal day-to-day activities	0.02	0.06	0.04
Been able to face up to your problems	0.06	0.06	0.06
Been feeling unhappy and depressed	0.59	0.90	0.75
Been losing confidence in yourself	0.86	0.96	0.91
Been thinking yourself as a worthless person	0.85	0.96	0.91
Been feeling reasonable happy, all things considered	0.22	0.19	0.20