Marital Status, the Economic Benefits of Marriage, and Days of Inactivity due to Poor Health

Table 3

Rate ratios for interaction effects from zero-inflated negative binomial regression: National Health and Nutrition Examination Surveys, 2001–2006, 𝑁=13,678.

Married × income-to-poverty ratio
Unmarried, IPR 0–0.99 (reference)	1.00
Unmarried, IPR 1–3.99	0.76^**
Unmarried, IPR 4-5	0.49^***
Married, IPR 0–0.99	0.79^*
Married, IPR 1–3.99	0.68^***
Married, IPR 4-5	0.40^***
Married × health insurance
Unmarried uninsured (reference)	1.00
Unmarried insured	1.21
Married uninsured	1.01
Married insured	1.01

Notes: all analyses adjust for sampling weights, complex sample design, survey year, zero-inflation factors, age, gender, race/ethnicity, household size, education, smoking, obesity, and usual source of care. Married × IPR interaction adds adjustment for any health insurance. Married × health insurance interaction adds adjustment for family income-to-poverty ratio. ^*𝑃<0.05, ^**𝑃<0.01, ^***𝑃<0.001.