Table 1 Baseline characteristics of patients before and after propensity score matching
No. of patients | Before match | After match | ||||
|---|---|---|---|---|---|---|
IBS (n = 365) | Controls (n = 1157) | p | IBS (n = 354) | Controls (n = 354) | p | |
Age (median [IQR])†| 45 [33, 59] | 45 [35, 57] | 0.407 | 45 [36, 57] | 46 [35, 59] | 0.610 |
BMI (median [IQR])†| 23.67 [21.46, 25.80] | 22.80 [20.94, 5.62] | 0.027* | 22.90 [20.97, 25.65] | 23.03 [20.98, 25.48] | 0.605 |
Country (n, %) |  |  |  < 0.001* |  |  | 1.000 |
 USA | 175 (47.95) | 832 (71.91) |  | 175 (49.44) | 175 (49.44) |  |
 UK | 169 (46.30) | 274 (23.68) |  | 160 (45.20) | 160 (45.20) |  |
 Australia | 11 (3.01) | 19 (1.64) |  | 9 (2.54) | 9 (2.54) |  |
 Switzerland | 6 (1.64) | 12 (1.04) |  | 6 (1.69) | 6 (1.69) |  |
 Canada | 4 (1.10) | 20 (1.73) |  | 4 (1.13) | 4 (1.13) |  |
Sex (n, %) |  |  |  < 0.001* |  |  | 1.000 |
 Female | 238 (65.21) | 488 (42.18) |  | 227 (64.12) | 227 (64.12) |  |
 Male | 127 (34.79) | 669 (57.82) |  | 127 (35.88) | 127 (35.88) |  |