Cognitive-behavioral therapy on psychological stress and quality of life in subjects with pulmonary tuberculosis: a community-based cluster randomized controlled trial

Table 4 PHQ-9 scores of patients with different degrees of anxiety and depression

group	Mild				Moderate				Moderate-Severe				Severe
group	n	scores	t	p	n	scores	t	p	n	scores	t	p	n	scores	t	p
Intervention group
baseline	100	7.01 ± 1.47	13.588	< 0.01	43	11.88 ± 1.12	8.852	< 0.01	20	17.65 ± 1.11	1.510	0.14	8	23.10 ± 1.44	0.796	0.44
2 months	100	4.42 ± 1.22	13.588	< 0.01	43	8.39 ± 2.33	8.852	< 0.01	20	16.86 ± 2.06	1.510	0.14	8	22.32 ± 2.37	0.796	0.44
Control group
baseline	103	6.84 ± 1.39	0.769	0.44	39	12.13 ± 1.47	1.727	0.09	19	17.48 ± 1.26	0.307	0.76	7	22.89 ± 1.52	0.194	0.85
2 months	103	6.99 ± 1.41	0.769	0.44	39	11.58 ± 1.34	1.727	0.09	19	17.75 ± 1.35	0.307	0.76	7	23.06 ± 1.75	0.194	0.85

PHQ-9 consisted of nine items with a total score ranging from 0 to 27 points. Higher scores indicated greater severity of symptoms. A score of 0–4 points indicated no depression, 5–9 points indicated mild depression, 10–14 points indicated moderate depression, 15–19 points indicated heavy depression, and 20–27 points indicated severe depression

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