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