Reproducibility and sensitivity to change of various methods to measure joint space width in osteoarthritis of the hip: a double reading of three different radiographic views taken with a three-year interval

Table 2 Baseline characteristics of the 50 patients for whom radiographs were available

Baseline characteristic	Low stratum: JSW <2.5 mm (n = 25)	High stratum: JSW ≥ 2.5 mm (n = 25)	Total (n = 50)
Age (years; mean ± SD)	60.6 ± 8.2	59.9 ± 10.9	60.2 ± 9.6
Sex (n [%] female)	15/25 (60%)	14/25 (56%)	29/50 (58%)
BMI (kg/m²; mean ± SD)	27.5 ± 5.5	25.8 ± 3.0	26.6 ± 4.5
Disease duration (years; mean ± SD)	5.2 ± 4.5	3.6 ± 3.2	4.4 ± 4.0
Lequesne index (0–24; mean ± SD)	7.2 ± 2.0	6.9 ± 1.9	7.1 ± 2
WOMAC (total score: 0–100; mean ± SD)	35 ± 23.3	27.10 ± 15.75	31.12 ± 20.15
Global pain on VAS (mm; mean ± SD)	39.4 ± 25.8	35. 7 ± 15.1	37.6 ± 21.0

BMI, body mass index; JSW, joint space width; SD, standard deviation; VAS, visual analogue scale; WOMAC, Western and Ontario MacMaster University.

ISSN: 1478-6362