Table 2.

Measurement, cut-points, prevalence, score and r of depression and poor sleep quality and quality of the included studies

	Depression				Poor sleep quality (PSQI)			ra	Depression Score (number of patients in each group)		Quality (M-NOS)
Study	Measurement	Cut-point	Prevalence	Score	Cut-point	Prevalence	PSQI score		Good sleep quality (PSQI < 6)	Poor sleep quality (PSQI ≥ 6)
Cervilla O et al. (2020)	HADS-D	NA	NA	4.28 ± 4.81	≥ 6	NA	8.08 ± 4.00	0.549*	NA	NA	2
Chandrasekhara PK et al. (2009)	CES-D	≥ 16	70%	21 ± 11	≥ 6	62%	6.4 ± 3.8	0.675***	12.26 ± 9.26 (19)	26.26 ± 8.26 (31)	3
Costa Da et al. (2005)	CES-D	≥ 16	29%	13.02 ± 11.35	≥ 6	56%	6.98 ± 4.03	0.560***	NA	NA	3
Kasitanon N et al. (2013)	HAM-D	≥ 7	NA	15.75 ± 11.80	≥ 6	55.36%	7.86 ± 5.42	0.707***	9.64 ± 8.74 (25)	20.68 ± 11.75 (31)	2
Kotb HA et al. (2013)	CES-D	≥ 16	73.3%	20.80 ± 6.98	≥ 6	76.7%	8.47 ± 3.53	0.698***	12.14 ± 2.27 (7)	23.43 ± 5.64 (23)	3
Mirbagher L et al. (2016)	HADS-D	≥ 8	46.1%	NA	≥ 6	57.1%	7.06 ± 0.46	NA	5.4 ± 3.8 (33)	8.0 ± 4.0 (44)	3
Moraleda V et al. (2017)	HADS-D	NA	NA	5.05(3.68)	NA	NA	8.62(3.13)	0.204	NA	NA	2
Moon SJ et al. (2018)	PHQ-9	≥ 10	46.3%	9.42 ± 7.68	> 5	85.4%	9.06 ± 5.38	0.644**	NA	NA	3
Tench CM et al. (2000)	HADS-D	≥ 8	37%	6.00 ± 4.50	≥ 6	59%	8.00 ± 4.50	0.416***	NA	NA	4

^*P < 0.05, ^**P < 0.01, ^***P < 0.001. ‡a: Pearson correlation coefficient. †Values were number, percentage, mean ± standard deviation, or median (standard deviation)

HADS-D, Hospital Anxiety and Depression Scale-Depression; CES-D, Center for Epidemiological Studies Depression scale; HAM-D, Hamilton rating scale for depression; PHQ-9, the nine-item Patient Health Questionnaire; NA, not available; PSQI, Pittsburgh Sleep Quality Index; M-NOS, Modified Newcastle–Ottawa Scale