Table 2.
BMD (T score) and OP morbidity in males and females after age-stratified adjustment
| Age (years) |
Male
|
Female
|
Z | P-valuea | χ2 | P-valueb | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| N | BMD (T score) | OP (%) | N | BMD (T score) | OP (%) | |||||
| ≤50 | 25 | 0.05 (−0.70, 0.95) | 0 (0) | 264 | −0.5 (−1.4, 0.73) | 5 (1.89) | 0.631 | 0.578 | FISHER | 1 |
| 51–55 | 30 | −0.21 (−1.08, 1.03) | 0 (0) | 916 | −0.5 (−1.4, 0.4) | 22 (2.4) | 1.514 | 0.130 | FISHER | 1 |
| 56–60 | 187 | −0.3 (−1.2, 0.9) | 1 (0.53) | 1,244 | −0.8 (−1.6, 0.08) | 54 (4.34) | 5.257 | <0.001 | 6.372 | 0.012 |
| 61–65 | 307 | −0.41 (−1.47, 1.15) | 4 (1.3) | 621 | −1.13 (−1.9, −0.15) | 54 (8.7) | 10.891 | <0.001 | 19.162 | <0.001 |
| 66–70 | 220 | −0.6 (−1.19, 1.6) | 4 (1.82) | 393 | −1.2 (−1.94, −0.4) | 37 (9.41) | 11.125 | <0.001 | 13.042 | <0.001 |
| 71–75 | 142 | −0.72 (−1.43, 1.51) | 2 (1.41) | 275 | −1.3 (−2.1, −0.38) | 40 (14.55) | 8.952 | <0.001 | 17.843 | <0.001 |
| 76–80 | 95 | −0.8 (−1.72, 2.23) | 1 (1.05) | 194 | −1.58 (−2.3, −0.7) | 33 (17.01) | 10.112 | <0.001 | 15.644 | <0.001 |
| >80 | 29 | −0.83 (−1.09, 1.97) | 1 (3.44) | 46 | −1.61 (−1.49, 0.83) | 8 (17.39) | 4.957 | <0.001 | 3.191 | 0.047 |
Notes: Data are presented as median with interquartile range. χ2 value is the result of Fisher’s exact test between males and females. Z value of Kruskal–Wallis test was from comparison of different age groups. P<0.05 was considered statistically significant,
a
P means BMD compared between different age groups;
b
P means BMD compared between males and females.
Abbreviations: BMD, bone mineral density; FISHER, Fisher’s exact test; OP, osteoporosis.