Table 2.
Odds ratios for low muscle mass prevalence according to RT frequency and sex
| n | RT levels |
Crude model OR (95% CI) |
Adjusted model OR (95% CI) |
||||
|---|---|---|---|---|---|---|---|
| Frequency | Time | Training period | |||||
| (days/week) | (min/week) | (months) | ≥1 year (%) | ||||
| Total | |||||||
| Non-RT | 112,219 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 | 1 (reference)a | 1 (reference)a |
| 1 day/week | 782 | 1.00 ± 0.00 | 44.51 ± 31.59 | 18.08 ± 41.51 | 70.84 | 1.30 (1.07–1.58)** | 0.98 (0.74–1.32) |
| 2 days/week | 1,859 | 2.00 ± 0.00 | 103.86 ± 59.89 | 27.95 ± 54.47 | 79.29 | 0.92 (0.80–1.07) | 0.84 (0.69–1.03) |
| 3–4 days/week | 6,329 | 3.42 ± 0.49 | 201.98 ± 116.28 | 25.24 ± 46.85 | 82.04 | 0.75 (0.69–0.82)**** | 0.78 (0.69–0.88)**** |
| ≥5 days/week | 5,150 | 5.86 ± 0.89 | 368.36 ± 214.38 | 24.76 ± 47.87 | 87.65 | 0.87 (0.80–0.95)** | 0.73 (0.64–0.83)**** |
| Men | |||||||
| Non-RT | 38,696 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 | 1 (reference)a | 1 (reference)a |
| 1 day/week | 394 | 1.00 ± 0.00 | 43.66 ± 31.87 | 22.65 ± 54.80 | 73.10 | 1.00 (0.79–1.27) | 1.17 (0.80–1.71) |
| 2 days/week | 849 | 2.00 ± 0.00 | 101.08 ± 61.70 | 32.48 ± 66.85 | 81.15 | 0.73 (0.61–0.87)*** | 0.85 (0.65–1.12) |
| 3–4 days/week | 2,673 | 3.44 ± 0.50 | 193.62 ± 121.23 | 28.69 ± 56.82 | 84.55 | 0.62 (0.56–0.69)**** | 0.76 (0.65–0.89)*** |
| ≥5 days/week | 2,464 | 6.01 ± 0.91 | 350.32 ± 222.82 | 27.29 ± 56.71 | 90.38 | 0.74 (0.66–0.82)**** | 0.73 (0.62–0.86)*** |
| Women | |||||||
| Non-RT | 73,523 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 | 1 (reference)a | 1 (reference)a |
| 1 day/week | 388 | 1.00 ± 0.00 | 45.38 ± 31.32 | 13.44 ± 19.62 | 68.56 | 1.22 (0.86–1.75) | 0.74 (0.46–1.19) |
| 2 days/week | 1,010 | 2.00 ± 0.00 | 106.20 ± 58.26 | 24.14 ± 40.94 | 77.72 | 0.94 (0.73–1.20) | 0.81 (0.60–1.11) |
| 3–4 days/week | 3,656 | 3.40 ± 0.49 | 208.09 ± 112.15 | 22.72 ± 37.76 | 80.20 | 0.75 (0.65–0.87)*** | 0.80 (0.67–0.96)* |
| ≥5 days/week | 2,686 | 5.71 ± 0.85 | 384.91 ± 204.98 | 22.44 ± 37.86 | 85.15 | 0.69 (0.58–0.83)**** | 0.73 (0.59–0.91)** |
RT resistance training, OR odds ratio, CI confidence interval, BMI body mass index
ap < 0.0001 in the test for trend of ORs, * p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001. Adjusted for age, sex, drinking, smoking, educational level, BMI, hypertension, and diabetes mellitus