Table 4 Use of Hospital Care in Case Plans that Replaced a Hospital Deductible with a Per-diem Copayment Compared to Concurrent Trends in Matched Control Plans that Maintained a Hospital Deductible, in the Time Period Prior to the Benefit Change
From: Association of daily copayments with use of hospital care among medicare advantage enrollees
Intervention Plans | Control Plans | Difference- in-Difference Estimates | ||||
|---|---|---|---|---|---|---|
2 Years Before Benefit Change | 1 Year Before Benefit Change | 2 Years Before Intervention Plan Changes | 1 Year Before Intervention Plan Changes | Unadjusted | Adjusted | |
All continuously enrolled beneficiaries | ||||||
Inpatient admissions per 100 enrollees | 20.0 | 19.0 | 20.1 | 19.6 | −0.4 (−1.3 to 0.4) | −0.4 (− 1.2 to 0.4) |
Inpatient days per 100 enrollees | 86.2 | 82.3 | 84.3 | 85.2 | −4.8 (−9.7 to 0.1) | −3.1 (−8.0 to 1.8) |
Proportion hospitalized (%) | 14.3 | 14.2 | 13.8 | 13.7 | −0.1 (− 0.6 to 0.4) | −0.5 (−1.0 to 0.0) |
Average inpatient length of stay | 4.1 | 4.1 | 4.1 | 4.1 | −0.1 (− 0.2 to 0.1) | −0.1 (− 0.2 to 0.1) |