Table 3.
Multilevel multinomial regression analyses for minor surgery and referral in comparison to no treatment
| Laceration/cut | Benign neoplasm skin/nevus | Sebaceous cyst | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Empty model | Adjusted model | Empty model | Adjusted model | Empty model | Adjusted model | |||||||
| Minor surgery | Referral | Minor surgery | Referral | Minor surgery | Referral | Minor surgery | Referral | Minor surgery | Referral | Minor surgery | Referral | |
| Intercept (SE) | Intercept (SE) | Intercept (SE) | Intercept (SE) | Intercept (SE) | Intercept (SE) | |||||||
| -2.18 (0.18) - 10.2% | -4.74 (0.22) - 0.9% | -2.05 (0.15) 11.4% |
-4.82 (0.23) 0.8% |
-0.94 (0.12) 28.1% |
-2.01 (0.13) 11.8% |
-0.80 (0.10) 31.0% |
-1.82 (0.12) 13.9% |
-0.87 (0.09) 29.5% |
-2.26 (0.12) 9.4% |
-0.89 (0.09) 29.1% |
-2.26 (0.12) 9.4% |
|
| OR (95% CI) | OR (95% CI) | OR (95% CI) | ||||||||||
| Gender, female | 0.85 (0.72-1.01) | 1.23 (0.68-2.20) | 0.94 (0.85-1.05) | 1.13 (0.96-1.33) | 0.62 (0.53-0.73) | 0.76 (0.58-0.99) | ||||||
| Age | 1.01 (1.01-1.01) | 1.01 (1.00-1.02) | 1.01 (1.01-1.01) | 0.99 (0.99-1.00) | 1.01 (1.01-1.02) | 1.00 (0.99-1.01) | ||||||
| Distance to hospital | 1.00 (1.00-1.00) | 1.00 (1.00-1.00) | 1.00 (1.00-1.00) | 1.00 (1.00-1.00) | 1.00 (1.00-1.00) | 1.00 (1.00-1.00) | ||||||
| Primary care nurse | 1.69 (0.96-2.99) | 1.66 (0.64-4.28) | 1.49 (1.06-2.09) | 1.43 (0.93-2.18) | 1.03 (0.71-1.49) | 1.32 (0.80-2.18) | ||||||
| Workload | 1.00 (1.00-1.00) | 1.00 (1.00-1.00) | 1.00 (1.00-1.00) | 1.00 (1.00-1.00) | 1.00 (1.00-1.00) | 1.00 (1.00-1.00) | ||||||
| Variance (SE) | Variance (SE) | Variance (SE) | Variance (SE) | Variance (SE) | Variance (SE) | |||||||
| Between GP practice variance | 1.25(0.30) | 0.76 (0.41) | 0.80 (0.21) | 0.74 (0.40) | 0.57 (0.13) | 0.67 (0.16) | 0.40 (0.09) | 0.51 (0.13) | 0.32 (0.09) | 0.38 (0.14) | 0.27 (0.08) | 0.33 (0.13) |
| Covariance | -0.26 (0.27) | -0.29 (0.22) | 0.11 (0.10) | -0.12 (0.08) | -0.11 (0.08) | -0.13 (0.07) | ||||||
| Correlations | Correlations | Correlations | Correlations | Correlations | Correlations | |||||||
| Correlation GP practice variances 'therapy groups'a | -0.27 (-0.51 - 0.02) | -0.38 (-0.60- -0.11) | 0.18 (-0.44--0.11) | -0.26 (-0.506 - 0.03) | -0.31 (-0.55 - -0.03) | -0.42 (-0.63 - -0.16) | ||||||
| ICC | 27.5 | 18.7 | 19.6 | 18.3 | 14.9 | 16.8 | 10.8 | 13.5 | 8.7 | 10.3 | 7.7 | 9.2 |
| 95% range on GP practice | 1.6-44.3% | 0.2-3.4% | 3.1-34.4% | 0.2-2.9% | 7.2-66.3% | 2.3-43.1% | 13.7-55.9% | 4.5-35.5% | 14.6-49.3% | 3.6-22.4% | 16.5-46.1% | 4.2-20.0% |
*Based on multilevel multinomial regression analyses for minor surgery and referral rate in comparison to no treatment in care-episodes of laceration/cut, benign neoplasm skin/nevus and sebaceous cyst.
a This is the correlation between the variances of the two defined therapy groups (minor surgery and referral) at GP level
b because we used nominal data the variance at the lowest level (episodes) is not determined but given by π2/3
c calculated by intercept plus and minus 1.96 times the square root of the between practice variation and transformed back from a logit scale).