Table 1 Patient demographics.

From: The Impact of Blood Transfusion on Recurrence and Mortality Following Colorectal Cancer Resection: A Propensity Score Analysis of 4,030 Patients

 

Before matching

After matching

Transfusion (N = 1,010)

Non-transfusion (N = 3,020)

Standardized difference

Transfusion (N = 486)

Non-transfusion (N = 486)

Standardized difference

Age, year

73 ± 12

66 ± 13

50.6

72 ± 12

73 ± 12

6.7

Gender, male

632 (62.6%)

1847 (61.2%)

2.9

299 (61.5%)

327 (67.3%)

12.1

ASA class ≥3

572 (56.6%)

800 (26.5%)

64.2

251 (51.6%)

272 (56%)

8.7

Comorbidites

   Diabetes

304 (30.1%)

568 (18.8%)

26.5

251 (51.6%)

272 (56.0%)

4.1

   Coronary artery disease

179 (17.7%)

284 (9.4%)

24.5

130 (26.7%)

139 (28.6%)

2.7

   Heart failure

118 (11.7%)

141 (4.7%)

25.8

80 (16.5%)

85 (17.5%)

6.0

   Stroke

102 (10.1%)

140 (4.6%)

21.0

48 (9.9%)

57 (11.7%)

3.5

   Chronic kidney disease

262 (25.9%)

305 (10.1%)

42.1

44 (9.1%)

49 (10.1%)

9.4

Pretreatment CEA, μg·L−1

3.45 (2.29–8.89)

2.60 (1.94–4.41)

38.5

3.16 (2.22–6.54)

3.3 (2.23–7.7)

5.4

Hemoglobin conc., g·dL−1

10.1 ± 1.8

12.8 ± 1.6

156.5

11.1 ± 1.6

11.1 ± 1.5

1.7

Platelet count, 103·μL−1

287 ± 122

236 ± 77

49.7

258 ± 104

268 ± 108

9.4

INR > 1

506 (50.3%)

1380 (45.8%)

9.2

222 (45.7%)

229 (47.1%)

9.4

Tumour location, left-sided

573 (56.7%)

2314 (76.6%)

43.2

325 (66.9%)

320 (65.8%)

2.2

Epidural block

182 (18.0%)

504 (16.7%)

3.5

87 (17.9%)

106 (21.8%)

9.8

Anaesthesia time, min

300 (240–375)

285 (240–345)

31

300 (240–375)

315 (270–390)

17.7

Laparoscopic surgery

40 (4%)

261 (8.6%)

19.4

30 (5.2%)

13 (2.3%)

15.7

Preoperative C/T ± R/T

259 (8.6%)

93 (11.6%)

3.1

50 (10.3%)

58 (11.9%)

5.2

Postoperative C/T (<90 days)

1334 (44.2%)

364 (45.4%)

8.3

225 (46.3%)

229 (47.1%)

1.6

Postoperative R/T (<90 days)

38 (1.3%)

8 (1.0%)

7.1

12 (2.5%)

10 (2.1%)

2.8

  1. Values were mean ± SD, counts (percent), or median (interquartile range). Continuous variables are analysed with Wilcoxon rank-sum tests; categorical variables are analysed with Pearson chi-square tests or Mann-Whitney U tests, as appropriate. Standardized difference is the difference in mean, proportion or rank divided by the pooled standard error, expressed as percentage; imbalance is defined as absolute value greater than 20 (small effect size). ASA: American Society of Anesthesiologists; CEA: carcinoembryonic antigen; Con.: concentration; INR: international normalized ratio; C/T: chemotherapy; R/T: radiotherapy.
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