Table 3

Interaction effects

OutcomeSignificant (p<0.05) interaction term with hospital safety net burdenCategory of hospital safety net burdenReference categoryLinear combination OR (95% CI)
Any complicationMedicaid patientsHigh safety net burdenPrivate insurance, low safety net burden1.33 (1.15 to 1.54)***
Cardiovascular complicationOther insuranceHigh safety net burdenPrivate insurance, low safety net burden0.73 (0.45 to 1.17)†
LOSMedicaid patientsMedium safety net burdenPrivate insurance, low safety net burden1.22 (1.19 to 1.24)***‡
LOSMedicareHigh safety net burdenPrivate insurance, low safety net burden1.12 (1.11 to 1.13)***‡
LOSOther insuranceHigh safety net burdenPrivate insurance, low safety net burden1.29 (1.26 to 1.33)***‡
LOSUninsuredHigh safety net burdenPrivate insurance, low safety net burden1.48 (1.34 to 1.64)***‡
LOSHispanicMedium safety net burdenWhite, low safety net burden1.10 (1.08 to 1.11)***‡
LOSMissing (race)Medium safety net burdenWhite, low safety net burden1.09 (1.07 to 1.11)***‡
LOSOther raceHigh safety net burdenWhite, low safety net burden1.24 (1.19 to 1.30)***‡
LOSMissing (race)High safety net burdenWhite, low safety net burden1.19 (1.15 to 1.22)***‡
LOSFourth quartile median incomeHigh safety net burdenFirst quartile, low safety net burden1.04 (1.02 to 1.05)***‡
LOSMissing (income)High safety net burdenFirst quartile, low safety net burden1.29 (1.21 to 1.37)***‡
  • *P<0.05, **p<0.01, ***p<0.001.

  • †P=0.19. Though this model with interaction terms was shown to be a significantly better fit than the main model, its linear combination of coefficeints was not significant at alpha=0.05.

  • ‡Incidence rate ratio (IRR), 95% CI.