Table 1.
Baseline characteristics of participants
| Characteristic | Surgical cohort (n=209) |
Hypertrophy control cohort (n=124) |
P value of difference* |
| Mean (SD; range) age (years) | 42.6 (13.4; 18 to 72) | 45.3 (13.1; 20 to 79) | 0.079 |
| Age group (years): | |||
| 18–24 | 24 (12) | 12 (10) | |
| 25–34 | 38 (18) | 15 (12) | |
| 35–44 | 64 (31) | 26 (21) | |
| 45–54 | 41 (20) | 43 (34) | |
| 55–64 | 31 (15) | 21 (18) | |
| ≥65 | 11 (5) | 7 (6) | |
| Mean (SD) BMI (kg/m2) | 32.7 (6.0) | 32.2 (6.1) | 0.468 |
| Obesity status: | |||
| Non-obese (<30) | 71 (34) | 48 (39) | 0.326 |
| Obese (≥30) | 138 (66) | 74 (61) | |
| Missing | 0 (0) | 2 (0) | |
| Smoking status: | |||
| Non-smoker | 108 (52) | 78 (63) | 0.243 |
| Current smoker | 35 (17) | 14 (11) | |
| Ex-smoker <12 months | 15 (7) | 5 (5) | |
| Ex-smoker >12 months | 47 (23) | 25 (20) | |
| Missing | 4 (0) | 2 (0) | |
| Bra cup size: | |||
| ≤D | 13 (6) | 4 (3) | |
| DD | 43 (21) | 13 (11) | |
| E | 50 (24) | 19 (15) | |
| F | 46 (22) | 27 (22) | |
| G | 35 (17) | 37 (30) | |
| ≥H | 19 (10) | 19 (15) | |
| Missing | 3 (0) | 5 (0) |
Values are numbers (percentages) unless stated otherwise.
*Using independent samples t-test or χ2 test as appropriate.
BMI, body mass index.