Table 3.

Adjusted odds ratio of hospitalization by insurance stability within a 6-month interval for patients from two Massachusetts open safety net hospital systems

Concurrent Insurance Stability Group*	n (6-mo Intervals)	Adjusted† OR (95% CI)
		Total Patient Sample	Non-Hispanic White	Hispanic	Black/African American	Asian/Asian Pacific Islander
Hospitalized
Stable private insurance‡	42,107	Reference	Reference	Reference	Reference	Reference
Stable public insurance§	47,805	2.12 (1.95–2.31)	2.41 (2.11–2.74)	1.71 (1.20–2.43)	1.98 (1.77–2.22)	1.74 (1.15–2.62)
Any switchǁ	13,110	2.02 (1.83–2.23)	2.37 (2.01–2.80)	1.74 (1.15–2.63)	1.86 (1.64–2.11)	1.43 (0.70–2.92)
Always uninsured¶	6,362	1.03 (0.89–1.20)	1.52 (1.13–2.05)	1.02 (0.60–1.75)	0.87 (0.73–1.05)	1.10 (0.48–2.51)
		Interaction race† insurance stability P value = 0.08

Definition of abbreviations: CI = confidence interval; OR = odds ratio.

Bolded ORs are significant.

A total of 15,797 patients (6,089 White, 1,046 Hispanic, 7,847 Black, and 815 Asian) were included in the analysis.

^*Data presented based on the 6-month interval; note that some patients may be moving in and out of insurance categories throughout the study period.

^† Adjusted for time, age, sex, comorbidities, site of care, education, income, and race.

^‡ Stable private: always privately insured.

^§ Stable public: always publicly insured (Medicare, Medicaid, and/or subsidized).

^ǁ Insurance switch: includes gain (uninsured to insured), switch but not loss or gain (switch between private, Medicare, Medicaid, and subsidized categories), and insurance loss (insured to uninsured).

^¶ Always uninsured: no insurance at any point within the 6-month interval.