Table 4.

Multilevel model for changes in headache disability (HIT-6) from pre-treatment across post-treatment and follow-up.

Variable	Estimate	SE	t	p	CI lower	CI upper
Intercept	−0.15	3.02	−0.05	.961	−6.13	5.84
Linear Time	0.90	0.68	1.33	.188	−0.45	2.25
Covariates
Age	0.02	0.05	0.28	.778	−0.09	0.12
Race/Ethnicity	0.87	0.86	1.01	.315	−0.84	2.58
Baseline BMI	0.07	0.07	1.03	.308	−0.06	0.20
Baseline HIT-6	0.55	0.11	5.14	<.0001	0.34	0.77
Baseline PCS	−0.21	0.06	−3.61	<.0001	−0.32	−0.09
Baseline ASC	−0.19	0.14	−1.32	.189	−0.46	0.09
Baseline MI days	0.09	0.14	0.64	.525	−0.18	0.36
Baseline MI duration	−0.10	0.05	−2.21	.029	−0.19	−0.01
Baseline MI pain severity	0.08	0.35	0.23	.818	−0.61	0.77
Condition [0=ME; 1=BWL]	0.76	1.00	0.76	.448	−1.22	2.74
Variables
PCS Δ	0.18	0.05	3.34	.001	0.07	0.29
ASC Δ	0.50	0.13	3.70	<.0001	0.23	0.76
BMI Δ	0.02	0.10	0.23	.820	−0.17	0.21
MI days Δ	0.13	0.12	1.05	.297	−0.11	0.36
MI duration Δ	−0.01	0.03	−0.24	.808	−0.06	0.05
MI pain severity Δ	0.62	0.19	3.27	.001	0.24	0.99