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Table 1 Basic characteristics of subjects

From: The effect of common variants in GDF5 gene on the susceptibility to chronic postsurgical pain

Variation

Case (n = 1048)

Control (n = 2062)

P value*

Age (year, mean ± SD)

61.1 ± 7.1

61.1 ± 7.6

0.95

Gender [n, (%)]

 Male

580 (55.3%)

1143 (55.4%)

0.98

 Female

468 (44.7%)

919 (44.6%)

BMI (mean ± SD)

25.97 ± 1.44

26.06 ± 1.56

0.11

PAS (mean ± SD)

2.27 ± 0.98 (0–3)

5.72 ± 1.60 (4–9)

< 0.01

Smoking [n, (%)]

250 (23.9%)

514 (24.9%)

0.51

Drinking [n, (%)]

311 (29.8%)

642 (31.1%)

0.40

With prior pain history

118 (11.3%)

220 (10.7%)

0.62

  1. PAS pain analog scale, SD standard deviation
  2. *Pearson χ2 value