Table 1.
Participant demographics, n = 303.
| Lost to Follow up, n = 135 | Included in Final Analysis, n = 168 | p | |
|---|---|---|---|
| Age, mean ± SD (95%CI) | 26.8 ± 6.6 (25.7 to 28.0) | 29.2 ± 7.9 (28.0 to 30.4) | p = 0.006 |
| Sex, male, n (%) | 42 (31.1%) | 51 (30.7%) | p = 0.888 |
| BMI, mean ± SD (95%CI) | 24.5 ± 5.4 (23.5 to 25.4) | 24.3 ± 2.9 (23.9 to 24.7) | p = 0.799 |
| Educational level, n (%) | 9 (6.7%) | 7 (4.2%) | p = 0.045 |
| Primary education | 76 (56.3%) | 71 (42.6%) | |
| Secondary education | 36 (26.7%) | 57 (33.4%) | |
| Tertiary | 14 (10.4%) | 32 (19.1%) | |
| Master’s, Doctoral or equivalent education | 0 (0%) | 1 (0.6%) | |
| “Do not know” | |||
| Currently studying, n (%) | 68 (50.4%) | 86 (51.2%) | p = 0.887 |
| Employed, n (%) | 93 (68.9%) | 120 (71.4%) | p = 0.631 |
| Currently smoking, n (%) | 12 (8.9%) | 12 (7.2%) | p = 0.576 |
| Units of alcohol per week, median (IQR) | 2 (0.2 to 5) | 2.5 (1 to 5) | p = 0.307 |
| Previous primary sport, n (%) | p = 0.052 | ||
| CrossFit or functional training | 1 (0.7%) | 2 (1.2%) | |
| Cycling | 4 (2.9%) | 12 (7.1%) | |
| Dance | 2 (1.5%) | 2 (1.2%) | |
| Fitness | 43 (31.9%) | 34 (20.2%) | |
| Team sports (handball, soccer etc.) | 10 (7.4%) | 25 (14.9%) | |
| Gymnastics | 6 (4.4%) | 2 (1.2%) | |
| Running | 19 (14.1%) | 40 (23.8%) | |
| Strength training | 14 (10.4%) | 12 (7.1%) | |
| Swimming | 2 (1.5%) | 5 (3.0%) | |
| Yoga or Pilates | 3 (2.2%) | 5 (3.0%) | |
| Other sports | 11 (8.2%) | 12 (6.6%) | |
| I did not exercise previously | 14 (10.4%) | 15 (8.9%) | |
| Unanswered | 6 (4.4%) | 2 (1.8%) | |
| Eating habits prior to participation, n (%) | p = 0.331 | ||
| Did not think about eating habits | 13 (9.6%) | 16 (9.5%) | |
| Thought a little bit about eating habits | 79 (58.5%) | 107 (63.7%) | |
| Thought a lot about eating habits | 37 (27.4%) | 43 (25.6%) | |
| Unanswered | 6 (4.4%) | 2 (1.2%) | |
| Physically active at least 30 min daily with moderate to high intensity, n (%) | 68 (50.4%) | 83 (49.4%) | p = 0.096 |
| Unanswered | 10 (7.4%) | 4 (2.4%) | |
| Physically active with high intensity twice a week of at least 20 min duration, n (%) | 75 (55.6%) | 99 (58.9%) | p = 0.117 |
| Unanswered | 10 (7.4%) | 4 (2.4%) | |
| Having pain, soreness, stiffness or swelling within the last two weeks in at least one body region prior to CrossFit, n (%) | 70 (54.26%) | 87 (52.4%) | p = 0.752 |
Abbreviations: SD: Standard deviation, BMI: Body mass index, IQR: Interquartile range. “Currently studying” and “Employed” were two different questions and could be answered independently fromeach other. Between group difference analyzed with Chi2 test, Between group difference analyzed with Kruskal–Wallis test, Between group difference analyzed with a t-test using unequal variance. Significant between group differences are marked with bold. The currently studying and employed variable adds up to more than 100% as these outcomes were investigated separately; therefore, a participant could both be studying and be employed.