Table 2

Cumulative 9-year incidence (%) of HOA in those with no HOA at baseline

Men (n=374)Women (n=436)
Radiographic HOA (≥1 joint(s))33.7 (28.9 to 38.5)34.6 (30.2, 39.1)
 DIP (2nd–5th) OA16.0 (12.3 to 19.8)19.0 (15.4 to 22.7)
 PIP (2nd–5th) OA5.1 (2.9 to 7.3)4.8 (2.8 to 6.8)
 Thumb IP OA9.4 (6.4 to 12.3)8.7 (6.1 to 11.4)
 MCP (1st–5th) OA6.1 (3.7 to 8.6)1.4 (0.3 to 2.5)
 Thumb base OA17.4 (13.5 to 21.2)21.1 (17.3 to 24.9)
 Wrist OA1.6 (0.3 to 2.9)0.2 (0.0 to 0.7)
Radiographic HOA (≥2 joints)25.1 (20.7 to 29.5)23.6 (19.6 to 27.6)
Symptomatic HOA (≥1 joint(s))4.0 (2.0 to 6.0)9.7 (6.9 to 12.4)
Erosive HOA (≥1 joint(s))0.0 (0.0 to 0.0)1.6 (0.4 to 2.8)
Total KL score (all hand joints)2.3 (0, 0–4)2.8 (0, 0–4)
HOA joints (KLG≥2)0.9 (0, 0–2)1.1 (0, 0–1)
Erosive joints*1.7 (1, 1–2)2.2 (2, 1–3)
Symptomatic HOA joints2.1 (1, 1–2)2.7 (2, 1–3)
  • Data presented as % (95% CI), except for total KL score and number of affected joints at follow-up presented as mean (median, interquartile range).

  • * In subjects with incident erosive HOA.

  • In subjects with incident symptomatic HOA.

  • DIP, distal interphalangeal; HOA, hand osteoarthritis; IP, interphalangeal; KL, Kellgren and Lawrence; KLG, Kellgren–Lawrence grade; MCP, metacarpophalangeal; OA, osteoarthritis; PIP, proximal interphalangeal.