In those with CWP in 1991, the forward stepwise logistic regression model identified three factors* predicting persistent CWP
| Outcome: CWP in 1998 | ||
|---|---|---|
| Number of exposures in model | No CWP n (%) | CWP n (%) |
| *Too tired during the day, aged over 50 years, dry mouth/eyes. | ||
| 0 | 40 (91) | 4 (9) |
| 1 | 50 (64) | 28 (36) |
| 2 | 18 (51) | 17 (49) |
| 3 | 3 (23) | 10 (77) |