Supplemental Table 2.

Poisson regression model to estimate rate of abortion occurring at or after 12 weeks by age group and time period (May 2017–December 2020; N=35,411)

Group	Estimated log rate ratios	Standard error	P value
Intercept	−2.038	0.401	<.001
COVID-19 period (reference: pre-March 2020)	−0.082	0.265	.757
Age group category (reference: minors)
Young adults	−0.631	0.177	<.001
Adults	−0.613	0.184	.001
Interaction term COVID-19 period by age group
Young adults	−0.150	0.274	.584
Adults	−0.003	0.270	.992
Race and ethnicitya
Hispanic	−0.012	0.037	.742
Non-Hispanic Asian or Asian Indian	−0.046	0.053	.389
Non-Hispanic Black	−0.036	0.027	.173
Non-Hispanic White	−0.015	0.010	.116
Insurance type categorya
Private	−0.139	0.067	.039
Public	−0.016	0.019	.404
Self-pay	−0.060	0.031	.050
Seasonality terms
cos1	0.095	0.030	.002
cos2	−0.058	0.027	.036
sin1	0.009	0.028	.747
sin2	−0.054	0.028	.050
Number of days open per month	0.011	0.017	.521
Month number	−0.002	0.002	.457

Fulcher et al. Abortion care utilization during COVID-19. Am J Obstet Gynecol 2022.

^aAdjusting for monthly distribution of demographic groups excluding unknown subgroups; subgroup proportions were centered and scaled with 1-unit increase corresponding to a 10% increase in subgroup proportion.