Article Figures & Data
Figures
- Figure 1.
Selection of participants. OA, osteoarthritis.
Tables
- Table 1.
Presence of Other-Hand Osteoarthritis (OA) Risk Factors among Patients and Controls
Risk Factor Patients with Hand OA (n) Controls (n) P Age (years) 64.4 (135) 57.0 (80) <.001 Female sex (%) 74.8 (101) 68.8 (55) .335 Family history of hand OA 48.9 (66) 32.5 (26) .039 >5 years heavy labor 19.3 (26) 16.2 (13) .857 Values presented as % (n).
- Table 2.
Prevalence and Duration of Habitual Knuckle Cracking in Patients and Controls by Joint Type
Joint Cracked Controls Patients with OA P DIP (% [n]) 9.2 (11) 2.2 (2) .097 Duration* (years) 26.3 36.0 .257 PIP (% [n]) 16.1 (23) 15.5 (11) .911 Duration* (years) 28.3 21.6 .556 MCP (% [n]) 14.3 (25) 10.0 (4) .474 Duration* (years) 26.4 25.0 .764 1CMC (% [n]) 2.9 (4) 1.3 (1) .746 Duration* (years) Data unavailable Data unavailable Any joint 23.2 (19) 18.0 (24) .361 ↵* Independent sample t test was used.
OA, osteoarthritis; DIP, distal interphalangeal; PIP, proximal interphalangeal; MCP, metacarpophalangeal; 1CMC, first carpometacarpal.
- Table 3.
Comparison of Habitual Knuckle Cracking Duration (Any Frequency) with Duration of Hand Osteoarthritis (OA) Symptoms Using Paired Samples t Test
Joint (n) Duration of OA Symptoms (Years) Duration of KC (Years) P DIP (7) 7.6 27.1 .006 PIP (19) 9.7 25.1 .001 MCP (15) 7.9 23.1 .003 1CMC (3) 8.0 33.3 .091 OA, osteoarthritis; DIP, distal interphalangeal; PIP, proximal interphalangeal; MCP, metacarpophalangeal; 1CMC, first carpometacarpal; KC, knuckle cracking.
