TABLE 4.

Multivariable Analysis and Decomposition of the Difference in Severe Headache/Migraine Prevalence Between Sexual Minority (Lesbian or Bisexual) Women and Heterosexual Women (United States, 2013–2018)

	Multivariable Analysis				Decomposition
Variable (Reference Group)	Adjusted Prevalencea	OR	95% CI	p	% of Difference by Sexual Orientation
Sociodemographic characteristics
Sexual minority women	23.3%	1.25	1.10–1.43	0.001	—
Heterosexual women	19.8%	—	—	—	—
Age/5		1.20	1.14–1.25	<0.001	42.2%
Age/52		0.98	0.98–0.99	<0.001
Racial/ethnic minority (non-Hispanic white)		0.75	0.71–0.78	<0.001	0.6%
Highest education in family (≥bachelor’s degree)					0.0%
<High school degree		1.10	1.01–1.21	0.029
High school degree		1.03	0.96–1.11	0.386
Associates degree/some college		1.18	1.12–1.25	<0.001
Financial worry score		1.07	1.05–1.09	<0.001	4.8%
Financial worry score2		1.00	1.00–1.00	<0.001
Food insecurity in family (vs. none)		1.28	1.21–1.37	<0.001	3.2%
Family member(s) had unmet need for care (did not)		1.38	1.28–1.48	<0.001	3.6%
Family member(s) needs ADL help (does not)		1.54	1.42–1.67	<0.001	−0.3%
Family size		1.00	0.98–1.02	0.982	0.0%
Health-related characteristics
Positive SMI screen (negative)		2.37	2.14–2.63	<0.001	6.6%
Typical sleep hours/night		0.62	0.58–0.66	<0.001	3.3%
Typical sleep hours/night2		1.03	1.02–1.03	<0.001
Current smoker (not current)		1.19	1.11–1.27	<0.001	2.4%
Average number of drinks/drinking day		1.06	1.02–1.11	0.004	0.6%
Average number of drinks/drinking day2		0.99	0.98–1.00	0.005
Body mass index (normal weight)					2.1%
Underweight		1.00	0.85–1.16	0.956
Overweight		1.12	1.05–1.19	<0.001
Obese		1.22	1.15–1.30	<0.001
≥4 chronic medical conditions (<4)		1.99	1.82–2.18	<0.001	−1.3%
Total % of higher prevalence among sexual minority women					67.8%

^aPrevalence of severe headache/migraine in the two sexual orientation groups is adjusted by variables listed in the table, as well as the NHIS survey year. A superscripted 2 next to a variable indicates a quadratic term.