Table 5. . Baseline patient characteristics predictive of total all-cause healthcare costs during the follow-up period.

Baseline characteristic	Mean rate ratio†	Mean confidence limits		p-value
Age group vs 12–17 years
18–29 years	1.05	1.02	1.09	.004
30–39 years	1.28	1.24	1.33	<.0001
40–49 years	1.41	1.36	1.46	<.0001
USA geographic region: other vs South	1.05	1.04	1.07	<.0001
Pregnancy any time during the baseline period: yes vs no	1.48	1.43	1.54	<.0001
Baseline CCI score group: ≥1 vs 0	1.61	1.57	1.64	<.0001
Baseline other GYN conditions: yes vs no
Any sexually transmitted infection	0.99	0.97	1.02	.66
Pelvic inflammatory disease	0.96	0.93	1.00	.046
Postprocedural gynecological infection	1.48	1.39	1.58	<.0001
Preterm labor/delivery	0.98	0.91	1.06	.62
Female infertility	1.56	1.50	1.63	<.0001

^†Mean rate ratio interpretation: ratio of 1.41 for women 40–49 vs 12–17 means the mean healthcare cost for women 40–49 was 41% higher than that for the 12–17 group.

BV: Bacterial vaginosis; GYN: Gynecological; CCI: Charlson Comorbidity Index.