Negative Binomial Regression Showing Factors Influencing Health Care Use Within Patients With Multiple Morbidities
| Characteristics | IRR for Medicines Taken No. (95% CI) | IRR for Visits to Hospital No. (95% CI) |
|---|---|---|
| Age | ||
| 18–29 y | [Reference] | [Reference] |
| 30–39 y | 1.17 (0.64–2.14) | 1.94 (0.91–4.12) |
| 40–49 y | 1.25 (0.70–2.23) | 2.15 (1.07–4.34)a |
| 50–59 y | 1.20 (0.68–2.12) | 1.86 (1.01–3.77)a |
| 60–69 y | 1.13 (0.63–2.02) | 2.02 (1.02–2.99)a |
| ≥70 y | 1.28 (0.69–2.34) | 1.85 (0.90–3.81) |
| Sex | ||
| Male | [Reference] | [Reference] |
| Female | 1.00 (0.82–1.21) | 1.07 (0.77–1.49) |
| Place of living | ||
| Rural | [Reference] | [Reference] |
| Urban | 0.83 (0.68–1.00) | 1.09 (0.64–1.88) |
| Ethnicity | ||
| Aboriginal | [Reference] | [Reference] |
| Nonaboriginal | 1.21 (0.90–1.63) | 1.08 (0.80–1.46) |
| Schooling | ||
| No schooling | [Reference] | [Reference] |
| Primary completed | 0.73 (0.59–1.01) | 1.43 (1.08–1.89)a |
| Secondary and above | 0.89 (0.71–1.10) | 1.49 (1.03–2.24)a |
| Socioeconomic Status | ||
| Below poverty line | [Reference] | [Reference] |
| Above poverty line | 1.13 (0.93–1.36) | 1.03 (0.77–1.36) |
| Marital status | ||
| Currently married | [Reference] | [Reference] |
| Currently not married | 1.11 (0.84–1.47) | 1.17 (0.85–1.61) |
| Facility | ||
| Public | [Reference] | [Reference] |
| Private | 1.39 (1.17–1.66)a | 1.20 (0.91–1.58) |
| Number of morbidities | 1.30 (1.20–1.40)a | 1.05 (0.91–1.21) |
IRR = incidence rate ratio.
↵a Significant at P <.05, adjusted for age-group, sex, ethnicity, education, socioeconomic status, marital status, place of living, number of morbidities as continuous and types of facility.