Table 3 Comparison of anthropometric, clinical and densitometric variables between patients with AS with and without pre-sarcopenia (Baumgartner definition)
AS patients with pre-sarcopenia N = 33 | AS patients without pre-sarcopenia N = 34 | P | |
|---|---|---|---|
Age (yrs): m (SD) | 42.1 (11.6) | 40.7 (10.7) | NS |
Height (m): m (SD) | 1.71 (0.06) | 1.73 (0.06) | NS |
Weight (kg): m (SD) | 64.6 (11.0) | 76.9 (11.9) | <0.0001 |
BMI (kg/m2): m (SD) | 21.6 (3.6) | 25.7 (3.7) | <0.0001 |
Disease duration (yrs): m (SD) | 9.4 (9.1) | 9.1 (6.6) | NS |
Lumbar spine BMD (g/cm2): m (SD) | 1.077 (0.23) | 1.164 (0.14) | NS |
Lumbar spine T-score: m (SD) | −1.05 (3.4) | −0.22 (1.2) | 0.032 |
Total hip BMD (g/cm2): m (SD) | 0.925 (0.13) | 1.026 (0.23) | 0.017 |
Total hip T-score: m (SD) | −0.89 (1.4) | −0.22 (1.1) | 0.017 |
Osteoporosis: n (%) | 10 (30.3) | 3 (8.8) | 0.0033 |
BASDAI (0–10): m (SD) | 4.4 (2.4) | 3.3 (2.5) | 0.003 |
BASMI (0–10): m (SD) | 2.8 (2.2) | 2.8 (2.7) | NS |
BASFI (0–100): m (SD) | 45.5 (26.5) | 35.0 (25.5) | NS |
BAS-G (0–100): m (SD) | 15.7 (16.8) | 19.1 (22.6) | NS |
Hand grip strength (kg): m (SD) | 22.5 (7.0) | 24.3 (9.8) | NS |
Timed get-up-and-go test (sec) < 10 sec: n (%) | 23 (74.2) | 24 (75.0) | NS |
Arm circumference (cm): m (SD) | 26.8 (1.9) | 30.5 (3.9) | <0.0001 |
Waist circumference (cm): m (SD) | 85.7 (10.8) | 97.1 (11.4) | <0.0001 |
MNA test (0–17): m (SD) | 0.29 (0.4) | 0.20 (0.3) | NS |
SASSS (0–72): m (SD) | 11.8 (16.7) | 10.0 (15.6) | NS |
CRP (mg/l): m (SD) | 20.1 (10.1) | 10.6 (10.1) | NS |
ESR (mm/H): m (SD) | 33.0 (22.3) | 21.2 (18.4) | NS |
Patients taking TNFi: n (%) | 13 (28.9) | 9 (42.9) | NS |