Effect of cover levels on diabetes-related hospitalisations and LOS
| Diabetes-related hospitalisation | LOS diabetes-related hospitalisation | Unplanned diabetes-related hospitalisation | LOS unplanned diabetes-related hospitalisation | |||||||||
| IRR | 95% CI | P value | IRR | 95% CI | P value | IRR | 95% CI | P value | IRR | 95% CI | P value | |
| Unweighted* | ||||||||||||
| Low cover | 3.2 | 2.6 to 4.1 | <0.001 | 3.3 | 2.2 to 4.8 | <0.001 | 1.4 | 1.0 to 2.1 | 0.06 | 2.8 | 1.4 to 5.3 | 0.002 |
| Medium cover | 2.9 | 2.6 to 3.4 | <0.001 | 3.3 | 2.6 to 4.2 | <0.001 | 1.8 | 1.5 to 2.3 | <0.001 | 1.8 | 1.2 to 2.7 | <0.001 |
| High cover | 2.8 | 2.7 to 3.0 | <0.001 | 1.9 | 1.8 to 2.1 | <0.001 | 1.7 | 1.5 to 1.8 | <0.001 | 1.5 | 1.3 to 1.8 | <0.001 |
| Perfect cover | Ref | Ref | Ref | Ref | ||||||||
| Weighted† | ||||||||||||
| Low cover | 3.2 | 2.0 to 5.3 | <0.001 | 1.2 | 0.4 to 3.3 | 0.7 | 1.8 | 0.9 to 3.5 | 0.1 | 1.6 | 0.4 to 6.5 | 0.4 |
| Medium cover | 3.3 | 2.8 to 4.0 | <0.001 | 1.7 | 1.1 to 2.8 | 0.02 | 2.0 | 1.4 to 2.8 | <0.001 | 1.0 | 0.5 to 1.8 | 0.9 |
| High cover | 2.7 | 2.6 to 2.9 | <0.001 | 1.7 | 1.3 to 2.1 | <0.001 | 1.7 | 1.5 to 1.9 | <0.001 | 1.2 | 0.9 to 1.6 | 0.1 |
| Perfect cover | Ref | Ref | Ref | Ref | ||||||||
| Doubly robust estimation‡ | ||||||||||||
| Low cover | 3.1 | 2.0 to 4.9 | <0.001 | 0.8 | 0.4 to 1.5 | 0.4 | 1.7 | 0.9 to 3.2 | 0.07 | 0.8 | 0.4 to 1.9 | 0.6 |
| Medium cover | 3.2 | 2.7 to 3.8 | <0.001 | 1.7 | 1.3 to 2.3 | <0.001 | 1.7 | 1.3 to 2.3 | <0.001 | 0.8 | 0.6 to 1.3 | 0.4 |
| High cover | 2.8 | 2.6 to 3.0 | <0.001 | 1.9 | 1.6 to 2.3 | <0.001 | 1.7 | 1.5 to 1.9 | <0.001 | 1.6 | 1.3 to 1.9 | <0.001 |
| Perfect cover | Ref | Ref | Ref | Ref | ||||||||
*The negative binomial model adjusted for current health service use (frequency of GP contacts, regularity of GP contact, UPC of GP contacts and number of specialist contacts), and pretreatment covariates (age, gender, indigenous, education, level of limitation, self-report comorbidity, comorbidity, complication, duration of diabetes, history of diabetes-related hospitalisation, cover, frequency of GP contacts, regularity, UPC, number of specialist visits).
†The negative binomial model adjusted for current health service use and weighted with IPTW of observed covariates.
‡ The negative binomial model adjusted for current health service use and pretreatment covariates and weighted with IPTW of observed covariates.
GP, general practitioner; IPTW, inverse probability treatment weight; LOS, length of stay; UPC, usual provider continuity.