Logistic regression modelling on contract scenarios
| Attribute levels | β | OR | SE | Z | P value |
| Duration of the contract (baseline=1 year) | |||||
| 3 years | 0.003 | 0.99 | 0.09 | 0.03 | 0.05 |
| 5 years | 0.42 | 0.65 | 0.06 | 4.36 | <0.001 |
| Payment system (baseline=capitation) | |||||
| Capitation+25% fee for service | 0.145 | 1.15 | 0.113 | 1.48 | 0.01 |
| Capitation+15% bonus | 0.39 | 1.4 | 0.146 | 3.9 | <0.001 |
| Type of employer (baseline=medical council) | |||||
| Medical sciences university | 0.52 | 1.68 | 0.16 | 5.3 | <0.001 |
| Health insurance | 0.86 | 2.37 | 0.23 | 8.7 | <0.001 |
| Number of people covered by GP’s services (baseline=1500 people) | |||||
| 2500 individuals | 0.033 | 1.03 | 0.1 | 0.34 | 0.73 |
| 4000 individuals | 0.1 | 1.11 | 0.1 | 1.08 | 0.28 |
| Geographic area covered by a GP (baseline=to 1.5 km) | |||||
| Between 1.5 and 5 km around the office | 0.03 | 0.96 | 0.09 | 0.34 | 0.7 |
| Without any restriction | 0.1 | 0.88 | 0.08 | 1.22 | 0.2 |
| Being allowed to render health services beyond the defined package (baseline=No) | |||||
| Yes | 0.05 | 1.005 | 0.086 | 0.06 | 0.9 |
| Allocating quota for being accepted in medical specialty (baseline=No) | |||||
| After 5 years | 0.78 | 2.18 | 0.21 | 7.8 | <0.001 |
| After 10 years | 0.01 | 1.01 | 0.09 | 0.18 | 0.05 |
GP, general practitioner.