Skip to main content

Table 5 Robustness analysis excluding older adults aged 60–64 years

From: Impact of the Affordable Care Act on participation in the Supplemental Nutrition Assistance Program among low-income older Medicare beneficiaries

  

SNAP participation

Parameter

Interpretation

β

P

SEa

t

Timeb

Control Pre–Trend

0.106

 < .001

.001

7.55

Interruptionc

Control Post–Level Change

-0.026

.62

.007

-1.28

Time∙Interruptiond

Control Post–Trend Change

-0.248

 < .001

.002

-10.99

Treatmente

Treatment/Control Pre–Level Difference

1.281

 < .001

.028

7.52

Treatment∙Timef

Treatment/Control Pre–Trend Difference

-0.008

.81

.008

1.26

Treatment∙Interruptiong

Treatment/Control Post–Level Difference

-0.053

.70

.032

-0.15

Treatment∙Interruption∙Timeh

Treatment/Control Change in Slope Difference Pre– to Post–

0.173

.001

.011

1.09

  1. Low-income status was determined at ≤ 138% of FPL
  2. Abbreviations. ITS interrupted time series, ACA Affordable Care Act, SNAP Supplemental Nutrition Assistance Program, β unstandardized beta coefficient, P p-value, SE standard error, t t-statistic, FPL Federal Poverty Level
  3. aNewey-West autocorrelation adjusted standard error
  4. bThe coefficient of ‘Time’ indicates the trend (or slope) in the probability of SNAP participation in the low-income younger group before interruption/intervention
  5. cThe coefficient of ‘Interruption’ shows the level change in the likelihood of SNAP participation right after the interruption/intervention in the low-income younger group
  6. dThe coefficient of ‘Time∙Interruption’ indicates the trend (or slope) change in the probability of SNAP participation after the interruption in the low-income younger group
  7. eThe coefficient of ‘Treatment’ shows the level difference in the probability of SNAP enrollment before the intervention between the low-income older Medicare group and the low-income younger group
  8. fThe coefficient of ‘Treatment∙Time’ indicates the trend (or slope) difference in the probability of SNAP participation before intervention between the low-income older Medicare group and the low-income younger group
  9. gThe coefficient of ‘Treatment∙Interruption’ shows the level difference in the probability of SNAP enrollment between the low-income older Medicare group and the low-income younger group
  10. hThe coefficient of ‘Treatment∙Interruption∙Time’ indicates the change in slope difference in the likelihood of SNAP participation between the low-income older Medicare group and the younger group with low incomes
Back to article page

BMC Health Services Research

ISSN: 1472-6963

Contact us