Table 1.
Baseline characteristics of randomized participants in the Breast Cancer and Exercise Trial in Alberta (BETA), 2010–2013.
| Baseline characteristic | MODERATE volume exercise (n = 191) Mean (SD) |
HIGH volume exercise (n = 195) Mean (SD) |
|---|---|---|
| Age (years) | 59.6 (5.1) | 59.4 (4.9) |
| VO2max (mL/kg/min) | 26.8 (4.9) | 26.8 (5.2) |
| Body mass index (kg/m2) | 29.5 (4.5) | 29.0 (4.4) |
| Biomarkers | Median (IQR) | Median (IQR) |
| Cortisol (nmol/L) | 367 (273–450) | 386 (301–477) |
| Cortisone (nmol/L) | 62.7 (48.8–76.8) | 64.4 (49.9–79.6) |
| Corticosteronea (nmol/L) | 7.8 (4.9–12.7) | 10.1 (5.8–14.4) |
| Other characteristics | Mean (SD) | Mean (SD) |
| Global sleep quality | 6.0 (3.4) | 6.0 (3.6) |
| General health | 53.8 (6.7) | 64.4 (49.9–79.6) |
Abbreviations: SD, standard deviation; VO2max, maximal oxygen consumption; IQR, interquartile range.
Global sleep quality: Measured by the Pittsburgh Sleep Quality Index and provides a score between 0 and 21. Higher scores indicate worse sleep quality.
General health: A component of the Medical Outcomes Study Short Form-36 Survey (SF-36) with scores ranging from 0 to 100. Higher scores indicate higher function or well-being.
There were no statistically significant differences at baseline between HIGH and MODERATE groups for these variables, with the exception of corticosterone (p = 0.02) and 11-deoxycortisol (p = 0.04), using the Wilcoxon rank sum test.