Table 1.

Characteristics of hand osteoarthritis probands and families

Proband sex (male:female)	13 (9.6%):123 (90.4%)
Average age of probands (years)	65.5 ± 8.51
Average age of siblings (years)	63.8 ± 9.10
Ethnic/racial breakdown of families
Caucasian	121 (89%)
Asian	8 (5.9%)
Hispanic	6 (4.4%)
Other	1 (0.7%)
Average number of siblings/family	1.1 (1 to 3)
Average duration of hand osteoarthritis in probands	11.7 years
Average body mass index of probands	25.8 ± 4.54
Average body mass index of siblings	26.6 ± 5.30

Data presented as number (percentage), mean ± standard deviation, or mean (range).