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.