Table 2.

Comorbidities in patients from selected studies.

Study (References)	N (% with pneumonia)	Diabetes	Hypertension	Cardiovascular disease	Malignancy	Chronic liver disease	COPD	Chronic kidney disease	Others (n, %)	Any co-morbidity
CROSS-SECTIONAL STUDIES AND CASE SERIES
Chan et al. (30)	6 (100%)	1 (22%)	2 (33%)	–	1 (22%)	–	–	–	Chronic sinusitis (22%)	–
Chang et al. (31)	13 (62%)	–	–	–	–	–	–	–		–
Chen et al. (27)	99 (100%)	–	–	40 (40%)	1 (1%)	–	–	–	Digestive system disorder (11%), Endocrine system disorder (13%), Nervous system disease (1%)	50 (51%)
Chung et al. (32)	21 (85%)	–	–	–	–	–	–	–	–	–
Huang et al. (25)	41 (100%)	8 (20%)	6 (15%)	6 (15%)	1 (2%)	1 (2%)	1 (2%)	–	–	13 (32%)
Kui et al. (26)	137 (100%)	14 (10.2%)	13 (9.5%)	10 (7.3%)	2 (1.5%)	–	2 (1.5%)	–	–	–
Song et al. (33)	51 (100%)	3 (6%)	5 (10%)	1 (2%)	–	1 (2%)	1 (2%)	–	–	–
Wang et al. (28)	138 (100%)	14 (10.1%)	43 (31.2%)	20 (14.5%)	10 (7.2%)	4 (2.9%)	4 (2.9%)	4 (2.9%)	HIV (1.4%)	64 (46.4%)
Wang et al. (34)	17 (Unspecified)	5 (29%)	7 (41%)	2 (11.7%)	–	1 (6%)	1 (5.8%)	2 (11.7%)	Surgery (29.4%)	11 (64.7%)
杨涛/Yang et al. (35)	10 (100%)	0	0	0	0	0	0	1 (10%)
马慧静/Ma et al. (29)*	22 (86%)	–	–	–	–	–	–	–	–	–
Pooled prevalence (95% CI)		10% (6–15%)	17% (7–28%)	12% (3–23%)	2% (<1–5%)	2% (<1–4%)	1% (<1–3%)	6% (2–15%)	–	45% (34–56%)
CASE REPORTS (WORLDWIDE)**
Bastola et al. (Nepal) (24)	1 (Pneumonia)	–	–	–	–	–	–	–	–	No
Holshue et al. (USA) (22)	1 (Pneumonia)	–	–	–	–	–	–	–	–	No
Kim et al. (S. Korea) (23)	1 (Pneumonia)	Yes	–	–	–	–	–	–	–	Yes
Phan et al. (Vietnam) (20)	1 (Pneumonia)	Yes	Yes	Yes	Yes	–	–	–	–	Yes
Rothe et al. (Germany) (21)	1 (Mild infection)	–	–	–	–	–	–	–	–	No

^*Study 马慧静/Ma et al. not included in pooled figures as subjects are children.

^**Case reports from patients in China found in Supplementary Material.

COPD, Chronic Obstructive Pulmonary Disease.