TABLE 5.

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

	Multivariable Analysis				Decomposition
Variable (Reference Group)	Adjusted Prevalencea	OR	95% CI	p	% of Difference by Sexual Orientation
Sociodemographic characteristics
Bisexual women	25.1%	1.33	1.04–1.70	0.026	—
Lesbians	20.7%	—	—	—	—
Age/5		1.33	1.01–1.75	0.039	38.5%
Age/52		0.97	0.96–0.99	0.002
Racial/ethnic minority (non-Hispanic white)		0.86	0.67–1.12	0.264	1.0%
Highest education in family (≥bachelor’s degree)					2.2%
<High school degree		1.06	0.58–1.94	0.844
High school degree		0.75	0.51–1.10	0.138
Associates degree/some college		1.45	1.08–1.94	0.014
Financial worry score		1.04	0.93–1.17	0.459	2.3%
Financial worry score2		1.00	1.00–1.00	0.613
Food insecurity in family (vs. none)		1.10	0.80–1.50	0.567	1.2%
Family member(s) had unmet need for care (did not)		1.30	0.97–1.73	0.079	0.4%
Family member(s) needs ADL help (does not)		2.02	1.31–3.12	0.002	0.0%
Family size		1.03	0.93–1.13	0.577	1.1%
Health-related characteristics
Positive SMI screen (negative)		1.94	1.30–2.91	0.001	7.2%
Typical sleep hours/night		0.64	0.43–0.97	0.036	4.1%
Typical sleep hours/night2		1.02	0.99–1.05	0.113
Current smoker (not current)		1.27	0.96–1.68	0.101	0.3%
Average number of drinks/drinking day		0.89	0.73–1.08	0.241	0.2%
Average number of drinks/drinking day2		1.02	0.99–1.05	0.185
Body mass index (normal weight)					0.2%
Underweight		1.16	0.37–3.66	0.795
Overweight		0.95	0.71–1.29	0.758
Obese		1.10	0.83–1.46	0.510
≥4 chronic medical conditions (<4)		2.24	1.38–3.64	0.001	−2.1%
Total % of higher prevalence among bisexual women					56.7%

^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.