Table 2.
Ordered logistic multilevel model of rates of referral letters sent by GPs in 34 countries
| Ni = 34 Nj = 6580 |
Odds Ratioa (CI) | p | |
|---|---|---|---|
| GP level | |||
| Number of face-to face visits in a normal working day | 1.006 | (1.001, 1.011) | 0.009 |
| Number of telephone calls in a normal working days | 0.998 | (0.990, 1.006) | 0.499 |
| Number of working hours per week | 1.003 | (0.997, 1.010) | 0.297 |
| Job satisfaction | 1.22 | (1.08, 1.39) | 0.002 |
|
Availability of support staff (ref. = no secretary and no nurse) | |||
| presence of a secretary or a nurse | 1.33 | (1.05, 1.70) | 0.019 |
| presence of both a secretary and a nurse | 1.37 | (1.05, 1.79) | 0.020 |
| Use of pc to send referral letters | 1.78 | (1.53, 2.09) | < 0.001 |
| Interactions between GPs and specialists | 1.45 | (1.28, 1.63) | < 0.001 |
| Country level | |||
| Gatekeeping system in place | 2.80 | (1.01, 7.75) | 0.048 |
| Variance Country level (SE) | 2.22 | (0.56) | |
|
Percentage of reduction of variance (Country level)b |
7% | ||
| Intraclass correlation (ICC)c | 40% | ||
a adjusted also for age and gender of GPs, practice location, and employment status of GPs
b this percentage was calculated by using the variance at country level of the initial model (variance initial model =2.41, SE = 0.60)
c the ICC of the initial model is 42%
Ni = number of countries
Nj = number of GPs
SE = standard error
CI = 95% confidence interval