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Table 2 Comparison of postoperative outcomes and pathologic findings between early and late weekday groups (EW and LW)

From: Absence of a weekday effect on short- and long-term oncologic outcomes of gastrectomy for gastric cancer: a propensity score matching analysis

 

All patients (n = 554)

P value

Propensity score-matched patients (n = 432)

P value

EW group (n = 239)

LW group (n = 315)

EW group (n = 216)

LW group (n = 216)

Operative time, minutes (median, IQR)

350 (290–421)

345 (277–420)

0.530

350 (290–420)

341 (280–420)

0.703

Operative blood loss, grams (median, IQR)

202 (39–482)

265 (45–645)

0.095

195 (30–460)

230 (40–639)

0.182

Blood transfusion (n, %)

0.581

 

0.499

 Not performed

198 (82.9%)

255 (80.9%)

 

181 (83.8%)

187 (86.6%)

 

 Performed

41 (17.1%)

60 (19.1%)

 

35 (16.2%)

29 (13.5%)

 

Hospital stay after surgery, days (median, IQR)

13 (11–17)

13 (11–18)

0.47

13 (10–17)

13 (10–18)

0.907

Death within 30 days after surgery (n, %)

0

2 (0.6%)

0.508

0

2 (0.9%)

0.499

In-hospital death (n, %)

0

4 (1.3%)

0.137

0

2 (0.9%)

0.499

Adjuvant chemotherapy (n, %)

0.211

 

0.788

 Absent

204 (85.4%)

255 (81.0%)

 

182 (84.3%)

185 (85.7%)

 

 Present

35 (14.6%)

60 (19.0%)

 

34 (15.7%)

31 (14.3%)

 

Tumor diameter, mm (median, IQR)

35 (25–50)

35 (22–60)

0.318

35 (25–50)

34 (20–50)

0.531

Retrieved number of lymph nodes (median, IQR)

40 (27–50)

38 (26–53)

0.922

39 (27–49)

38 (25–53)

0.930

Pathological tumor depth (n, %)

0.049

 

0.660

 pT1

134 (56.1%)

150 (47.6%)

 

123 (56.9%)

119 (55.1%)

 

 pT2

41 (17.1%)

53 (16.8%)

 

39 (18.1%)

40 (18.5%)

 

 pT3

43 (18.0%)

61 (19.4%)

 

39 (18.1%)

35 (16.2%)

 

 pT4

21 (8.8%)

51 (16.2%)

 

15 (6.9%)

22 (10.2%)

 

Pathological lymph node metastasis (n, %)

0.018

 

0.844

 pN0

173 (72.4%)

204 (64.8%)

 

156 (72.2%)

161 (74.5%)

 

 pN1

29 (12.1%)

49 (15.6%)

 

29 (13.4%)

24 (11.1%)

 

 pN2

10 (4.2%)

33 (10.5%)

 

10 (4.6%)

12 (5.6%)

 

 pN3

27 (11.3%)

29 (9.2%)

 

21 (9.7%)

19 (8.8%)

 

Pathological TNM stage (n, %)

0.075

 

0.992

 IA

120 (50.2%)

136 (43.2%)

 

109 (50.5%)

109 (50.5%)

 

 IB

42 (17.6%)

47 (14.9%)

 

40 (18.5%)

41 (19.0%)

 

 IIA

24 (10.0%)

35 (11.1%)

 

23 (10.7%)

24 (11.1%)

 

 IIB

19 (8.0%)

33 (10.5%)

 

16 (7.4%)

12 (5.6%)

 

 IIIA

8 (3.4%)

37 (11.8%)

 

8 (3.7%)

10 (4.6%)

 

 IIIB

20 (8.4%)

17 (5.4%)

 

15 (6.9%)

15 (6.9%)

 

 IIIC

6 (2.5%)

10 (3.2%)

 

5 (2.3%)

5 (2.3%)

 
  1. IQR interquartile range