Table 3.
The patients’ baseline characteristics after propensity-score-matched analysis (PSM). Chi2 and Mann–Whitney test p-values of the differences between the two study groups.
| All Patients (n = 645) | Pre-BCG Group after Matching (n = 171) | Post-BCG Group after Matching (n = 171) | p-Value | |
|---|---|---|---|---|
| Age (mean; SD) | 66.5; 10.9 | 66.2; 10.9 | 67.6; 9.9 | 0.248 |
| Gender M/F; (%) | 538/107 (83.4/16.6%) | 146/25 (85.4/14.6%) | 150/21 (87.7/12.3%) | 0.526 |
| Smoking history; n (%) | 0.931 | |||
| Never | 191 (29.6%) | 48 (28.1%) | 51 (29.8%) | |
| Former | 266 (41.2%) | 73 (42.7%) | 69 (40.4%) | |
| Current | 167 (25.9%) | 47 (27.5%) | 49 (28.6%) | |
| Unknown | 21 (3.3%) | 3 (1.7%) | 2 (1.2%) | |
| Concomitant CIS; n (%) | 0.634 | |||
| Yes | 126 (19.5%) | 30 (17.5%) | 37 (21.6%) | |
| No | 514 (79.7%) | 140 (81.9%) | 133 (77.8%) | |
| unknown | 5 (0.8%) | 1 (0.6%) | 1 (0.6%) | |
| Tumour size; n (%) | 0.393 | |||
| <3 cm | 315 (48.8%) | 80 (46.8%) | 68 (39.8%) | |
| ≥3 cm | 279 (43.3%) | 82 (47.9%) | 91 (53.2%) | |
| Unknown | 51 (7.9%) | 9 (5.3%) | 12 (7%) | |
| Tumour focality; n (%) | 0.267 | |||
| Solitary | 299 (46.4%) | 88 (51.5%) | 83(48.5%) | |
| Multiple | 317 (49.2%) | 77 (45%) | 86 (50.3%) | |
| Unknown | 29 (4.5%) | 6 (3.5%) | 2 (1.2%) | |
| Muscularis propria in the primary specimen | 0.949 | |||
| Yes | 467 (72.4%) | 140 (81.9%) | 142 (83%) | |
| No | 141 (21.9%) | 23 (13.4%) | 22 (12.9%) | |
| Unknown | 37 (5.7%) | 8 (4.7%) | 7 (4.1%) |
The value of adjusted p < 0.05 was considered statistically significant. Abbreviations: SD, standard deviation; M, male; F, female; CIS, carcinoma in situ.