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Table 2 Characteristics of patients undergoing emergency and elective surgeries on weekdays and weekends

From: Seven-day services in surgery and the “weekend effect” at a Japanese teaching hospital: a retrospective cohort study

Emergency

Weekday (633 days)

Weekend (290 days)

Total (% of samples)

P-value

Total, N (%)

712

(75)

235

(25)

947

  

Sexb, men, N (%)

317

(75)

104

(25)

421

(45)

0.94

Women, N (%)

395

(75)

131

(25)

526

(55)

 

Agea, years (IQR)

43

(33–68)

49

(32–74)

  

<.0001

Duration of staya, days (IQR)

9

(6–25)

11

(5–32)

  

0.58

Time of anaesthesiaa, minutes (IQR)

131

(90–195)

140

(94–201)

  

0.12

Time of operationa, minutes (IQR)

79

(54–135)

87

(53–134)

  

0.61

ASA Classb I, N (%)

338

(78)

98

(22)

436

(46)

0.08

II

260

(76)

80

(24)

340

(36)

 

III

89

(66)

45

(34)

134

(14)

 

IV

23

(68)

11

(32)

34

(4)

 

V

2

(67)

1

(33)

3

(0.32)

 

Elective

Weekday (633 days)

Weekend (290 days)

Total (% of samples)

P-value

Total, N (%)

5344

(82)

1151

(18)

6495

  

Sexb, men, N (%)

2677

(83)

566

(17)

3664

(50)

0.57

Women, N (%)

2667

(82)

585

(18)

3778

(50)

 

Agea, years (IQR)

57

(39–72)

41

(21–58)

  

<.0001

Duration of staya, days (IQR)

7

(4–15)

5

(2–7)

  

<.0001

Time of anaesthesiaa, minutes (IQR)

143

(99–215)

111

(77–154)

  

<.0001

Time of operationa, minutes (IQR)

94

(59–156)

68

(40–105)

  

<.0001

ASA Classb I, N (%)

2566

(77)

771

(23)

3337

(51)

<.0001

II

2337

(87)

348

(13)

2685

(41)

 

III

436

(93)

32

(7)

468

(7)

 

IV

5

(100)

0

(0)

5

(0.08)

 

V

0

 

0

 

0

(0)

 
  1. Values are median (interquartile ranges; IQR) or number (proportion)
  2. Statistical analyses were performed using the Mann–Whitney U test(a) or the chi-square test(b)