Table 1.
Basic characteristics of the OP and non-OP population (n = 6267)
| Basic characteristics | OP status | P | |
|---|---|---|---|
| OP population | Non-OP population | ||
| Number | 602 | 5665 | – |
| Age (years) | 59.0 ± 6.9 | 51.5 ± 7.1 | < 0.001 |
| 40–49 (%) | 9.1 | 43.7 | |
| 50–59 (%) | 42.0 | 41.3 | |
| 60–69 (%) | 42.9 | 13.4 | |
| ≥ 70 (%) | 6.0 | 1.6 | |
| Gender (female, %) | 86.2 | 37.4 | < 0.001 |
| Smoking (%) | 8.8 | 26.6 | < 0.001 |
| Drinking (%) | 18.3 | 42.8 | < 0.001 |
| BMI (kg/m2) | 23.2 ± 3.0 | 24.6 ± 3.2 | < 0.001 |
| Obesity (BMI ≥ 28 kg/m2, %) | 6.6 | 14.0 | < 0.001 |
| Diabetes (%) | 12.1 | 11.2 | 0.499 |
| Hypertension (%) | 38.2 | 31.3 | 0.001 |
| Activity level (h/week) | 2.7 ± 3.7 | 2.1 ± 3.3 | 0.007 |
| Nutritional supplements (%) | 47.3 | 34.4 | < 0.001 |
| Dietary calcium intake (mg/day) | 443.4 ± 318.0 | 486.4 ± 325.0 | < 0.001 |
| Dietary fibre intake (g/day) | 15.8 ± 12.4 | 18.0 ± 14.9 | < 0.001 |
| Dietary energy intake (Kcal/day) | 1481.7 ± 776.0 | 1638.2 ± 750.7 | < 0.001 |
| Dietary selenium intake (μg/day) | 39.1 ± 31.1 | 44.0 ± 23.3 | < 0.001 |
OP osteoporosis, BMI body mass index
P values are for the test of difference between the OP population and non-OP population using one-way analysis of variance in case of normally distributed continuous variables, Kruskal-Wallis H test in case of non-normally distributed continuous variables and Pearson Chi-square test in case of categorical variables