Table 1.

Characteristics of the included studies

Author	Country	Type of study	Total patients	Sex (male)	Median age	Cancer		Non-cancer
						Total	Dead	Total	Dead
Chinese CDC51	China	Retrospective, multicenter cohort	20,812	NA	NA	107	6	20,705	498
Miyashita et al.52	USA	Retrospective, multicenter cohort	5,688	NA	NA	334	37	5,354	518
Goyal et al.53	USA	Retrospective, multicenter cohort	393	238	62.2	23	NA	370	NA
Baker et al.54	UK	Retrospective, single-center cohort	316	173	75	33	10	283	71
Benelli et al.55	Italy	Retrospective, single-center cohort	411	359	70.5	33	9	378	63
Rossi et al.56	Italy	Retrospective, multicenter cohort	2,653	1,328	63.2	301	44	2,352	173
Nikpouraghdam et al.57	Iran	Retrospective, single-center cohort	2,964	1,955	56	17	1	2,947	238
Borobia et al.58	Spain	Retrospective, single-center cohort	2,226	1,074	61	385	139	1,841	321
Vasco et al.59	Portugal	Retrospective, multicenter cohort	20,270	8,370	NA	603	47	19,667	455
Duanmu et al.60	USA	Retrospective, single-center cohort	100	56	45	3	NA	97	NA
Gold et al.61	USA	Retrospective, multicenter cohort	305	151	60	12	NA	293	NA
Sami et al.62	Iran	Retrospective, single-center cohort	490	299	56.6	15	NA	475	NA
Regina et al.63	Swiss	Retrospective, single-center cohort	200	120	70	26	NA	174	NA
Ji et al.64	Korea	Retrospective, multicenter cohort	5,172	2,289	42	364	NA	4,808	NA
Joharatnam-Hogan et al.65	UK	Retrospective, multicenter cohort	52	31	NA	26	6	26	6
Stroppa et al.66	Italy	Retrospective, single-center cohort	56	NA	NA	25	9	31	5
Dai et al.41	China	Retrospective, multicenter cohort	641	302	NA	105	12	536	NA
Mehta et al.67	USA	Retrospective, single-center cohort	218	127	NA	218	61	0	0
Yang et al.68	China	Retrospective, single-center cohort	52	28	63	52	11	0	0
Total			63,019	16,900	—	2,682	392	60,337	2,348

NA, not available.