Table 1 Subject characteristics

Age, years (median, range)

54 (25–85)

54 (25–85)

1.000

Women:Men

67:51

67:51

1.000

DAS28, % (median, range) (n = 110)

2.37 (0.49–5.85)

–

–

BASDAI, % (median, range) (n = 8)

1.42 (0.02–3.08)

–

–

PASI, % (median, range)

1.65 (0–29.40)

–

–

Arthritis duration, years (median, range)

9 (0–39)

–

–

Psoriasis duration, years (median, range)

16 (1–72)

–

–

FRAX Major, % (median, range) (n = 100)

3.7 (0.7–32)

2.6 (0–17.5)

0.003

FRAX Hip, % (median, range) (n = 100)

0.4 (0–16)

0.05 (0–6.1)

0.002

10 year probability of major osteoporotic fracture ≥20% (n, %)

1 (1%)

0 (0%)

–

10 year probability of hip fracture ≥3% (n, %)

8 (8%)

4 (4%)

–

L1-L4 areal BMD, g/cm² (median, range)

1.170 (0.793–1.184)

1.274 (0.920–1.760)

< 0.001

Femoral neck areal BMD, g/cm² (median, range)

0.952 (0.607–1.292) (n = 117*)

1.016 (0.760–1.550)

0.001

Distal radius total volumetric BMD, mg/cm³ (median, range)

284.3 (138.9–470.3)

367.0 (287.0–412.0)

< 0.001

Distal radius trabecular volumetric BMD, mg/cm³ (median, range)

190.0 (63.0–351.5)

207.0 (145.0–255.0)

0.002

Distal radius cortical volumetric BMD, mg/cm³ (median, range)

365.9 (175.8–686.5)

537.0 (411.0–537.0)

< 0.001

Calcium, mmol/L (median, range)

2.4 (2.2–2.7)

2.3 (2.1–2.7)

< 0.001

Phosphate, mmol/L (median, range)

0.96 (0.6–1.6)

1.10 (0.6–1.51)

< 0.001

Osteocalcin, μg/L (median, range)

17.7 (5–77)

17.9 (8.6–33)

0.186

CTx, μg/L (median, range)

0.255 (0.040–1.090)

0.200 (0.100–0.510)

< 0.001

PINP, μg/L (median, range)

46.2 (11.0–253.7)

35.0 (8.2–72.5)

< 0.001

PTH, pmol/L (median, range)

4.52 (1.43–11.69)

3.78 (1.6–9.6)

< 0.001

25OHD, nmol/L (median, range)

47.5 (10–120)

64 (10–137)

< 0.001

25OHD < 75 nmol/L

79% (n = 93)

58% (n = 68)

–

25OHD < 50 nmol/L

49% (n = 58)

28% (n = 33)

–