Table 2 Clinical characteristics of patients in terms of mortality

Age (years) (mean ± SD)

74.5 ± 12.1

47.9 ± 18.4

<0.0001

61.4 ± 18.1

47.2 ± 18.8

<0.0001

Sex; Male/Female (n,%)

18(9.1)/5(15.6)

180(90.9)/27(84.4)

NS^†

43(21.7)/12(37.5)

155(78.3)/20(62.5)

0.047

White blood cell count (10/μL) (mean ± SD)

12.5 ± 7.8

13.7 ± 6.5

NS^†

146.9 ± 86.7

132.0 ± 59.8

NS^†

Hemoglobin (g/dl) (mean ± SD)

12.8 ± 2.8

15 ± 2.3

<0.0001

14.3 ± 3.2

14.9 ± 2.1

NS^†

BUN (mg/dl) (mean ± SD)

123.5 ± 85.9

36.6 ± 20.9

<0.0001

70.5 ± 67.1

37.4 ± 26.2

<0.0001

Creatinine (mg/dl) (mean ± SD)

2.71 ± 2.07

1.15 ± 0.86

<0.0001

1.78 ± 1.32

1.20 ± 1.21

0.003

Albumin (g/L) (mean ± SD)

1.52 ± 0.51

2.57 ± 0.75

<0.0001

2.45 ± 0.69

3.12 ± 0.73

<0.0001

BP-S*(mm/Hg) (mean ± SD)

107 ± 28.4

125.9 ± 21.7

<0.0001

124.1 ± 28.6

123.9 ± 21.2

NS†

BP-D**(mm/Hg) (mean ± SD)

67.2 ± 19.4

76.7 ± 13.6

0.003

77.2 ± 16.9

75.3 ± 13.8

NS†

MAP***(mmHg) (mean ± SD)

80.4 ± 21.8

93.1 ± 15.03

<0.0001

92.8 ± 19.7

91.5 ± 14.9

NS†

Pulse (/ min) (mean ± SD)

113.2 ± 30.2

94.7 ± 14.3

<0.0001

104.6 ± 22.3

93.8 ± 14.7

<0.0001

Time from perforation to surgery (h) (n, %)

<24 h

1 (1.2)

80 (98.8)

0.001

28 (17.4)

133 (82.6)

<0.0001

>24 h

22 (15.1)

124 (84.9)

27 (39.7)

41 (60.3)

Perforation size (cm) (n, %)

<0.5

15 (8.9)

153 (91.1)

0.02

4 (13.8)

25 (86.2)

0.001

0.5-1

1 (3.4)

28 (96.6)

36 (21.1)

135 (78.9)

>1

7 (23.3)

23 (76.7)

15 (50)

15 (50)

Operation time (min) (mean ± SD)

103.3 ± 42.4

81.6 ± 28.1

0.001

95.7 ± 46.8

80.3 ± 22.8

0.002

Other medical illnesses (n,%)

Absent

4 (2.5)

155 (97.5)

<0.0001

22 (13.6)

140 (86.4)

<0.0001

Present

19 (27.5)

49 (72.1)

33 (48.5)

35 (51.5)