Table 2

Bone mineral density (BMD) of the patients with psoriatic arthritis (PsA) .

Femoral neckTotal hipLumbar spine 1–4Any site
Overall patients with PsA (N=140)
 BMD g/cm2 (SD)0.967 (0.141)1.017 (0.148)1.208 (0.170)
 T score (95% CI)−0.68 (−0.87 to −0.49)−0.25 (−0.44 to −0.06)0.10 (−0.15 to 0.33)
 Z score (95% CI)−0.11 (-0.26 to 0.06)−0.05 (−0.22 to 0.12)0.14 (−0.08 to 0.35)
 T score≤−2.5  n (%, 95% CI)6 (4.3%, 1.6% to 9.1%)2 (1.4%, 0.2% to 5.1%)3 (2.1%, 0.4% to 6.1%)9 (6.4%, 3.0% to 11.9%)
 Z score≤−1.0 n (%, 95% CI)28 (20.0%, 13.7% to 27.6%)25 (17.9%, 11.9% to 25.2%)25 (17.9%, 11.9 to 25.2%)43 (30.7%, 23.2% to 39.1%)
Females (N=71)
 BMD g/cm2 (SD) 0.954 (0.151)0.987 (0.161)1.188 (0.184)
 T score (95% CI)−0.69 (−0.98 to −0.39)−0.15 (−0.45 to 0.16)0.11 (−0.26 to 0.47)
 Z score (95% CI) 0.05 (−0.19 to 0.29) 0.12 (−0.15 to 0.40)0.345 (0.02 to 0.66)
 T score≤−2.5 n (%, 95% CI)5 (7.0%, 2.3% to 15.7%)2 (2.8%, 0.3% to 9.8%)1 (1.4%, 0.0% to 7.6%)6 (8.5%, 3.2% to 17.5%)
 Z score≤−1.0 n (%, 95% CI)10 (14.1%, 7.0% to 24.4%)12 (16.9%, 9.0% to 27.7%)10 (14.1%, 7.0% to 24.4%)16 (22.5%, 13.5% to 34.0%)
Males (N=69)
 BMD g/cm2 (SD)0.981 (0.130)1.047 (0.128)1.229 (0.152)
 T score (95% CI)−0.67 (−0.91 to −0.43)−0.36 (−0.58 to −0.15) 0.09 (−0.21 to 0.39)
 Z score (95% CI)−0.27 (−0.48 to −0.05)−0.24 (−0.43 to −0.04)−0.09 (−0.36 to 0.21)
 T score≤−2.5 n (%, 95% CI)1 (1.4%, 0.0% to 7.8%)0 (0%, 0.0% to 5.2%)2 (2.9%, 0.4% to 10.1%)3 (4.3%, 0.9% to 12.2%)
 Z score≤−1.0 n (%, 95% CI)18 (26.1%, 16.3% to 38.1%)13 (18.8%, 10.4% to 30.1%)15 (21.7%, 12.7% to 33.3%)27 (39.1%, 27.6% to 51.6%)
  • 95% CIs for the proportion of patients with T score≤2.5 and Z score≤1.0 were calculated by using a binomial test.