Table 2.

Baseline patient characteristics.

Study	Total Patients	Age	Males	Hypertension	Diabetes	Cardiovascular Disease	Renal Disease	Respiratory Disease
Elmunzer BJ et al., 2021 [22]; North America	1846	Mean 59.9 SD 16.4	1044 (56.6%)	1146 (62.1%)	658 (35.6%)	478 (25.9%)	175 (9.48%)	368 (20.0%)
Almario CV et al., 2020 [16]; America	3386	N/A	1168 (34.5%)	N/A	243 (7.2%)	N/A	N/A	N/A
Lee SW et al., 2020 [23]; Korea	4785	Mean 45.4 SD 18.8	1893 (44.7%)	945 (19.8%)	524 (11.0%)	263 (5.5%)	150 (3.1%)	523 (11.0%)
Israelsen SB et al., 2021 [15]; Denmark	4473	Median 60 IQR 48–73	1989 (44.5%)	N/A	564 (12.6%)	832 (18.6%)	231 (5.2%)	560 (12.6%)
Liu JJ et al., 2021 [24]; Mississippi	56	Mean 58 SD 14	20 (35.7%)	39 (69.6%)	24 (43.6%)	3 (5.4%)	7 (17.9%)	N/A
Fan X et al., 2021 [19]; United Kingdom	9469	>65	4611 (48.7%)	N/A	1226 (12.9%)	1741 (18.3%)	753 (7.9%)	1738 (18.3%)
Zhou J et al., 2021 [26]; China	4445	Median 44.8	307(58.6%)	209 (39.9%)	136 (26.0%)	136 (26.0%)	102 (19.5%)	516 (98.5%)
Lee SW et al., 2020 [25]; Korea	4785	≥18	N/A	N/A	N/A	N/A	N/A	N/A
Ramchandaran P et al., 2020 [18]; USA	295	>60	162 (54.9%)	209 (70.8%)	132 (44.7%)	45 (15.2%)	N/A	44 (14.9%)
McKeigue PM et al., 2021 [27]; Scotland	4251	N/A	N/A	N/A	949 (22.3%)	2649 (62.3%)	96 (2.3%)	1430 (33.6%)
Blanc F et al., 2020 [28]; France	89	Mean 84.4 SD 7.9	31 (34.8%)	61 (68.5%)	36 (40.4%)	53 (59.6%)	47 (52.8%)	15 (16.9%)
Huh K et al., 2020 [29]; South Korea	6507	N/A	2815 (43.3%)	1780 (27.4%)	1562 (24.0%)	1095 (16.8%)	749 (11.5%)	2893 (44.5%)
Xiang Y et al., 2021 [17]; United Kingdom	397,000	Mean 68.1 SD 8.1	177,441 (44.7%)	131,180 (33.0%)	28,287 (7.1%)	31,258 (7.9%)	N/A	69,397 (17.4%)
Vila-Corcoles A et al., 2021 [30]; Spain	205	N/A	83 (40.5%)	N/A	69 (33.7%)	85 (41.5%)	39 (19.0%)	42 (20.5%)