TABLE 3.
Logistic regressions of severe maternal morbidity on measures of preconception care
| Variables | Model (1) | Model (2) | Model (3) | Model (4) | ||||
|---|---|---|---|---|---|---|---|---|
| Odds ratio | 95% CI | Odds ratio | 95% CI | Odds ratio | 95% CI | Odds ratio | 95% CI | |
| Covariate | ||||||||
| Any preconception care | 1.09 | (1.06–1.12) | 0.97 | (0.95–1.00) | ||||
| Contraceptive services | 0.95 | (0.91–0.98) | 0.92 | (0.8–80.95) | ||||
| Pregnancy testing and counseling | 1.15 | (1.08–1.21) | 1.08 | (1.01–1.14) | ||||
| Achieving pregnancy | 1.37 | (0.82–2.29) | 1.29 | (0.76–2.19) | ||||
| Infertility services | 1.07 | (0.83–1.37) | 0.95 | (0.74–1.22) | ||||
| Preconception health services | 1.05 | (0.93–1.20) | 0.96 | (0.84–1.10) | ||||
| Sexually transmitted infection services | 1.11 | (1.05–1.17) | 1.00 | (0.95–1.05) | ||||
| Routine physical or gynecologic exams | 1.05 | (1.01–1.09) | 0.99 | (0.95–1.03) | ||||
| Maternal age (decades) | 0.98 | (0.95–1.00) | 0.97 | (0.95–1.00) | ||||
| Maternal age squared | 1.25 | (1.22–1.28) | 1.25 | (1.22–1.28) | ||||
| Short interpregnancy interval (<12 mo) | 0.98 | (0.94–1.03) | 0.98 | (0.94–1.03) | ||||
| Previous SMM | 6.78 | (5.89–7.81) | 6.77 | (5.88–7.80) | ||||
| Preterm birth | 1.79 | (1.72–1.86) | 1.79 | (1.72–1.85) | ||||
| Race/ethnicity | ||||||||
| White non-Hispanic | 1.00 | 1.00 | ||||||
| Black non-Hispanic | 1.72 | (1.66–1.78) | 1.72 | (1.67–1.78) | ||||
| Hispanic | 1.14 | (1.10–1.18) | 1.14 | (1.11–1.18) | ||||
| Asian, Pacific Islander, or Native Hawaiian | 1.13 | (1.05–1.22) | 1.13 | (1.05–1.21) | ||||
| American Indian or Alaskan Native | 1.60 | (1.47–1.75) | 1.60 | (1.46–1.75) | ||||
| More than 1 race | 1.29 | (1.08–1.54) | 1.29 | (1.08–1.54) | ||||
| Unknown | 1.18 | (1.11–1.26) | 1.18 | (1.11–1.26) | ||||
| Diabetes | 1.22 | (1.13–1.32) | 1.22 | (1.13–1.32) | ||||
| Hypertension | 2.64 | (2.51–2.79) | 2.64 | (2.51–2.79) | ||||
| Chronic kidney disease | 4.02 | (3.78–4.27) | 4.02 | (3.78–4.27) | ||||
| Depression | 1.18 | (1.13–1.24) | 1.18 | (1.13–1.23) | ||||
| Chronic obstructive pulmonary disease | 1.30 | (1.09–1.56) | 1.30 | (1.09–1.56) | ||||
| Tobacco use | 0.97 | (0.93–1.01) | 0.97 | (0.93–1.01) | ||||
| Rural residence | 1.05 | (1.02–1.09) | 1.06 | (1.02–1.09) | ||||
| Multiple births | 2.46 | (2.28–2.64) | 2.46 | (2.28–2.64) | ||||
CI, confidence interval; SMM, severe maternal morbidity.