Table A5.
Insurance and Outcomes in Low vs. High Uninsured Hospitals in NIS
| (1) | (2) | (3) | (4) | |
|---|---|---|---|---|
| Uninsured | Length of Stay | Log Length of Stay | Emergency Admit | |
| All Hospitals (100% of sample, including missing ages) | ||||
|
| ||||
| Ma* After | −0.0153 [−0.0201,−0.0104]*** | −0.0626 [−0.1102,−0.0150]** | 0.0006 [−0.0090,0.0103] | −0.0367 [−0.0585,−0.0149]*** |
| N (All Ages) | 36,282,073 | 36,343,449 | 36,343,449 | 36,345,238 |
| N Hospitals | 3,090 | 3,090 | 3,090 | 3,090 |
| N Hospitals in MA | 48 | 48 | 48 | 48 |
|
| ||||
| Mean MA Before | 0.0409 | 5.8833 | 1.5099 | 0.4789 |
| Mean Non-MA Before | 0.0543 | 5.6256 | 1.4517 | 0.4291 |
| Mean MA After | 0.0226 | 5.7516 | 1.5084 | 0.4912 |
| Mean Non-MA After | 0.0557 | 5.5819 | 1.4482 | 0.4491 |
|
| ||||
| Only Hospitals that Appear in Data At Least Once Before Reform | ||||
|
| ||||
| Ma* After | −0.0152 [−0.0202,−0.0102]*** | −0.0651 [−0.1155,−0.0147]** | −0.0001 [−0.0104,0.0102] | −0.0369 [−0.0596,−0.0143]*** |
| N (All Ages) | 30,390,240 | 30,441,321 | 30,441,321 | 30,442,760 |
| N Hospitals | 2,315 | 2,315 | 2,315 | 2,315 |
| N Hospitals in MA | 40 | 40 | 40 | 40 |
|
| ||||
| Mean MA Before | 0.0409 | 5.8833 | 1.5099 | 0.4789 |
| Mean Non-MA Before | 0.0543 | 5.6256 | 1.4517 | 0.4291 |
| Mean MA After | 0.0230 | 5.7678 | 1.5085 | 0.4856 |
| Mean Non-MA After | 0.0595 | 5.5803 | 1.4460 | 0.4473 |
|
| ||||
| Low Uninsured Hospitals | ||||
|
| ||||
| Ma* After | −0.0178 [−0.0228, −0.0129]*** | −0.0895 [−0.1522, −0.0269]*** | 0.0019 [−0.0074,0.0112] | −0.0409 [−0.0577, −0.0241]*** |
| N (All Ages) | 14,407,631 | 14,426,624 | 14,426,624 | 14,427,194 |
| N Hospitals | 1,157 | 1,157 | 1,157 | 1,157 |
| N Hospitals in MA | 29 | 29 | 29 | 29 |
|
| ||||
| Mean MA Before | 0.0303 | 5.8769 | 1.5058 | 0.4431 |
| Mean Non-MA Before | 0.0210 | 5.6142 | 1.4487 | 0.4087 |
| Mean MA After | 0.0220 | 5.7938 | 1.5119 | 0.4742 |
| Mean Non-MA After | 0.0295 | 5.6036 | 1.4438 | 0.4306 |
|
| ||||
| High Uninsured Hospitals | ||||
|
| ||||
| Ma* After | −0.0165 [−0.0246, −0.0085]*** | −0.0260 [−0.0782,0.0263] | −0.0063 [−0.0151,0.0024] | −0.0086 [−0.0312,0.0140] |
| N (All Ages) | 15,982,609 | 16,015,279 | 16,015,279 | 16,016,149 |
| N Hospitals | 1,158 | 1,158 | 1,158 | 1,158 |
| N Hospitals in MA | 11 | 11 | 11 | 11 |
|
| ||||
| Mean MA Before | 0.0635 | 5.8969 | 1.5186 | 0.5550 |
| Mean Non-MA Before | 0.0848 | 5.6360 | 1.4546 | 0.4478 |
| Mean MA After | 0.0314 | 5.5593 | 1.4808 | 0.5769 |
| Mean Non-MA After | 0.0845 | 5.5609 | 1.4478 | 0.4612 |
95% asymptotic CI clustered by state:
***
Significant at .01,
**
Significant at .05,
*
Significant at .10
MA*During included but coefficient not reported.
All specifications and means weighted using discharge weights.
All specifications include hospital fixed effects and time fixed effects for 2004 to 2008, quarterly.
Low Uninsured Hospitals have less than median uninsurance of 0.0398 before reform.
Sample sizes vary across specifications based on availability of dependent variable.
Source: HCUP NIS 2004–2008 authors’ calculations. See text for more details.