Table 6.
The effect of practice type on sight test outcome. All outcomes are relative to a patient being issued with no prescription at a multiple, relative to an independent.
| Age group | Variable | ||
|---|---|---|---|
| Under 16 |
χ2(3) = 3401.36, p < .001, R2 = .026 |
||
| b (S.E.) | Exp(B) (p) | 95% CI for odds ratio (lower-upper) | |
| New or changed | 0.343 (0.010) | 1.409 (p < .001) | 1.381–1.438 |
| Unchanged | 0.186 (0.019) | 1.204 (p < .001) | 1.161–1.250 |
| IMD | −0.164 (0.004) | 0.849 (p < .001) | 0.843–0.855 |
| 16–59 |
χ2(3) = 1593.84, p < .001, R2 = .017 |
||
|
b (S.E.) |
Exp(B) |
95% CI for odds ratio (lower-upper) |
|
| New or changed | 0.537 (0.021) | 1.711 (p < .001) | 1.644–1.782 |
| Unchanged | 0.298 (0.025) | 1.347 (p < .001) | 1.281–1.415 |
| IMD | −0.121 (0.004) | 0.886 (p < .001) | 0.878–0.894 |
| 60 and above |
χ2(3) = 2628.40, p < .001, R2 = .011 |
||
|
b (S.E) |
Exp(B) |
95% CI for odds ratio (lower-upper) |
|
| New or changed | 0.310 (0.048) | 1.363 (p < .001) | 1.241–1.498 |
| Unchanged | 0.057 (0.048) | 1.058 (p = .241) | 0.963–1.163 |
| IMD | −0.115 (0.003) | 0.891 (p < .001) | 0.887–0.896 |