1Chung-Ang University College of Medicine, Seoul, Korea.
2Department of Preventive Medicine, Chung-Ang University College of Medicine, Seoul, Korea.
Copyright © 2013 The Korean Society for Preventive Medicine
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Normal | Osteopenia | p-value | |
---|---|---|---|
Body mass index (kg/m2) | 0.53 | ||
< 23 | 41 | 13 | |
23-25 | 22 | 8 | |
≥25 | 23 | 4 | |
Socio-economic status | 0.0551 | ||
High | 32 | 4 | |
Middle | 47 | 16 | |
Low | 7 | 5 | |
Past physical activity (time/wk) | |||
≥1 | 63 | 10 | 0.002 |
<1 | 23 | 15 | |
Current physical activity (MET-min/wk) | |||
≥3000 | 13 | 0 | 0.072 |
600-3000 | 50 | 16 | |
<600 | 23 | 9 | |
Smoking | > 0.991 | ||
Non-smoker | 70 | 20 | |
Ex-smoker, smoker | 16 | 5 | |
Club activity | |||
Non-sports | 50 | 19 | 0.11 |
Sports | 36 | 6 | |
Calcium intake (mg/d) | |||
≥800 | 26 | 6 | 0.55 |
<800 | 60 | 19 | |
Vitamin D intake (IU/d) | |||
High ≥200 | 18 | 3 | 0.401 |
Low <200 | 68 | 22 |
Risk factors | Model 1 Unadjusted PR (95% CI) | Model 2 Adjusted PR1 (95% CI) | Model 3 Adjusted PR2 (95% CI) |
---|---|---|---|
Past physical activity (≥1 time/wk) | 0.41 (0.20, 0.84) | 0.35 (0.18, 0.68) | 0.37 (0.18, 0.75) |
Current physical activ- ity (1000 MET) | 0.71 (0.53, 0.96) | 0.66 (0.48, 0.91) | 0.64 (0.44, 0.91) |