Table 2 Baseline characteristics of the 105 patients whose radiographs were selected for the study.

Baseline characteristics	Mean (SD) or %
Age, years	60.9 (6.4)
Gender (% female)	93
Height	160.5 (6.1)
Weight	65.0 (12.2)
FIHOA, NU (ranges 0–100)	36.0 (13.7)*
Global pain on VAS, mm (ranges 0–100)	55.7 (15.7)
Handedness (right/left) (%)	83/17
Most painful joint at enrolment TMC (%)	42.6
PIP	26.7
DIP	30.7

DIP, distal interphalangeal; FIHOA, Functional Index for Hand Osteoarthritis; NU, 0–100 normalised units (The FIHOA score ranges usually from 0 to 30. It was normalised to range from 0 to 100.); PIP, proximal interphalangeal; TMC, trapezio‐metacarpal; VAS, visual analogue scale.

*The FIHOA score values have been normalised by 100.