Table 1 Univariable analysis of patients demographic and clinical characteristics before matching of non-cardiac surgical patients in Northwest Ethiopia, June 1, 2019, to July 01, 2021

Sex^a

 Female

1362(38.8)

713 (36.1)

649 (42.4)

 < 0.001

0.128

 Male

2144(61.2)

1261 (63.9)

883 (57.6)

ASA physical status^a

 I

2328(66.4)

1441 (73.0)

887 (57.9)

 < 0.001

0.331

 II

915(26.1)

431 (21.8)

484 (31.6)

 III

222(6.3)

86 (4.4)

136 (8.9)

 IV

41(1.2)

16 (0.8)

25 (1.6)

Comorbidity^a

 No

2736(78.0)

1630 (82.6)

1106 (72.2)

 < 0.001

0.25

 Yes

770(22.0)

344 (17.4)

426 (27.8)

Trauma^a

 No

2401(68.5)

1438 (72.8)

963 (62.9)

 < 0.001

0.215

 Yes

1105(31.5)

536 (27.2)

569 (37.1)

Type of surgery^a

 Elective

1834(52.3)

1076 (54.5)

758 (49.5)

0.003

0.101

 Emergency

1672(47.7)

898 (45.5)

774 (50.5)

Age (median [IQR])^b

42.5[35, 50]

34.00 [25.00, 50.00]

38.00 [27.00, 55.00]

 < 0.001

0.208

28-day postoperative mortality^a

 No

3390(96.7)

1932 (97.9)

1458 (95.2)

 < 0.001

0.148

 Yes

116(3.3)

42 (2.1)

74 (4.8)