Table 2.
Differences in Health Costs and Service Uses in CAPICHe Intervention Group Relative to Usual Care Control Group
| Outcomea | Adjusted results | Unadjusted results | |
|---|---|---|---|
| Zero-inflated model | Two-part model | ||
| Total non-maternity cost per year1–10 | $66 (− $136 to $267) | $59 (− $130 to $238) | − $43 (− $368 to $282) |
| Total overnight admission non-maternity cost per year1–10 | $11 (− $172 to $195) | $76 (− $90 to $232) | − $12 (− $301 to $277) |
| Total same-day admission non-maternity cost per year1–10 | − $40 (− $64 to − $16) | − $53 (− $83 to − $24) | − $60 (− $105 to − $16) |
| Rate of all admissions per 1000 person-yearsc, 1–9 | − 84 (− 137 to − 31) | − 95 (− 131 to − 60) | − 126 (− 210 to − 41) |
| Rate of overnight admissions per 1000 person-years1–4, 6–9 | 7 (− 17 to 31) | 8 (− 9 to 23) | 1 (− 25 to 27) |
| Rate of same-day admissions per 1000 person-yearsc, 1–8 | − 85 (− 129 to − 40) | − 98 (− 133 to − 65) | − 128 (− 205 to − 52) |
| Length of hospital stay (day) per 1000 person-years1–9 | 51 (− 200 to 302) | 69 (− 71 to 201) | 11 (− 299 to 322) |
The analysis is adjusted for 1age group (4 categories), 2sex, 3state of residence, 4clinical hierarchy, 5batch, 6historical cost group (3 categories), 7historical number of admissions (3 categories), 8number of coexist selected diagnosed chronic conditions (3 categories), 9number of follow-up days from randomisation, and 10proportion of surgical treatment (applies to the analysis of cost data only). CAPICHe, Costs to Australian Private Insurance – Coaching Health trial. aAll outcomes were obtained in 1 year post-randomisation. Covariates adjusted in the models are noted for each outcome variable. cUsing negative binomial model