Table 3.

Differences in key and grip strength between patients with thumb carpometacarpal osteoarthritis and healthy controls

	Key strength*	Grip strength*
Patients with thumb carpometacarpal osteoarthritis (CMC OA)
Symptomatic side	3.4 ± 1.3 (95 % CI 2.7–4.1)	11.1 ± 5.0 (95 % CI 8.5–13.8)
Non-symptomatic side	3.1 ± 1.1 (95 % CI 2.5–3.7)	9.7 ± 4.2 (95 % CI 7.5–11.9)
Healthy controls
Dominant side	5.0 ± 1.3 (95 % CI 4.3–5.7)	15.9 ± 8.0 (95 % CI 11.7–20.2)
Non-dominant side	4.4 ± 1.2 (95 % CI 3.8–5.0)	14.4 ± 7.7 (95 % CI 10.3–18.5)

Values (kilogram) are expressed as mean ± standard deviation (95 % CI)

*P < 0.05 (significant differences between groups, two-way ANOVA test)