Table 1 Basic characteristics of subjects according to compression fracture status (n = 556)

Age (years)

64.4 (9.5, 63.6–65.2)

63.1 (9.3, 62.3–64.0)

69.5 (6.9, 67.2–71.8) ^a

73.6 (7.1, 71.3–75.8) ^a

Height (cm)

149.7 (6.1, 149.2–150.2)

150.5 (5.7, 150.0–151.0)

146.2 (5.5, 144.4–148.0) ^a

143.6 (6.6, 141.6–145.7) ^a

Weight (kg)

52.4 (8.7, 51.7–53.1)

53.1 (8.7, 52.3–53.9)

49.7 (7.6, 47.2–52.2) ^a

46.8 (7.4, 44.5–49.2) ^a

Body mass index (kg/m²)

23.3 (3.4, 23.1–23.6)

23.4 (3.5, 23.1–23.7)

23.2 (3.5, 22.1–24.4)

22.6 (2.7, 21.8–23.5)

Walking speed (m/s)

1.24 (0.25, 1.22–1.26)

1.26 (0.24, 1.24–1.28)

1.17 (0.28, 1.08–1.26)

1.05 (0.24, 0.97–1.13) ^a

Chair stand time (s)

9.4 (3.1, 9.1–9.6)

9.1 (2.8, 8.8–9.3)

10.3 (2.9, 9.4–11.3) ^a

11.8 (4.4, 10.4–13.2) ^a

Functional reach (cm)

25.6 (7.2, 25.0–26.2)

26.3 (7.0, 25.7–27.0)

22.7 (6.8, 20.5–25.0) ^a

19.7 (6.8, 17.6–21.9) ^a

Number (%)

Back pain

164 (29.5)

128 (26.8)

18 (47.4) ^b

18 (43.9) ^b

Regular physical activity

288 (51.8)

248 (52.0)

23 (60.5)

17 (41.5)

Postmenopausal women

510 (91.7)

431 (90.4)

38 (100.0) ^b

41 (100.0) ^b

Median (1st, 3rd quartile)

No. of non-spine painful joints

0 (0, 2)

0 (0, 2)

0.5 (0, 2)

0 (0, 2)

No. of comorbidity

0 (0, 1)

0 (0, 1)

0 (0, 1)

0 (0, 1)