TABLE 4.
Logistic regressions of severe maternal morbidity, excluding blood transfusions, on measures of preconception care
| Variable | 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 | 1.03 | (0.98–1.08) | 0.93 | (0.89–0.98) | ||||
| Contraceptive services | 0.82 | (0.77–0.88) | 0.83 | (0.78–0.89) | ||||
| Pregnancy testing and counseling | 1.20 | (1.09–1.32) | 1.14 | (1.04–1.26) | ||||
| Achieving pregnancy | 1.28 | (0.53–3.10) | 1.04 | (0.41–2.66) | ||||
| Infertility services | 1.11 | (0.74–1.66) | 0.89 | (0.59–1.33) | ||||
| Preconception health services | 1.14 | (0.93–1.40) | 1.04 | (0.84–1.28) | ||||
| Sexually transmitted infection services | 1.03 | (0.94–1.13) | 0.98 | (0.90–1.07) | ||||
| Routine physical/gynecologic exams | 1.11 | (1.04–1.19) | 0.99 | (0.93–1.06) | ||||
| Maternal age (decades) | 1.18 | (1.13–1.23) | 1.18 | (1.13–1.23) | ||||
| Maternal age squared | 1.17 | (1.12–1.23) | 1.17 | (1.12–1.22) | ||||
| Short interpregnancy interval (<12 mo) | 0.80 | (0.73–0.87) | 0.79 | (0.72–0.86) | ||||
| Previous SMM | 6.37 | (5.00–8.10) | 6.35 | (4.99–8.07) | ||||
| Preterm birth | 1.95 | (1.84–2.06) | 1.94 | (1.83–2.06) | ||||
| Race/ethnicity | ||||||||
| White non-Hispanic | 1.00 | 1.00 | ||||||
| Black non-Hispanic | 1.43 | (1.35–1.50) | 1.43 | (1.35–1.51) | ||||
| Hispanic | 0.99 | (0.94–1.05) | 0.99 | (0.94–1.05) | ||||
| Asian, Pacific Islander, or Native Hawaiian | 0.98 | (0.87–1.11) | 0.98 | (0.87–1.11) | ||||
| American Indian or Alaskan Native | 1.43 | (1.23–1.66) | 1.42 | (1.22–1.66) | ||||
| More than 1 race | 0.94 | (0.68–1.31) | 0.94 | (0.68–1.31) | ||||
| Unknown | 1.14 | (1.03–1.26) | 1.14 | (1.03–1.26) | ||||
| Diabetes | 1.13 | (1.01–1.27) | 1.13 | (1.01–1.26) | ||||
| Hypertension | 3.50 | (3.25–3.78) | 3.50 | (3.25–3.77) | ||||
| Chronic kidney disease | 7.63 | (7.09–8.22) | 7.63 | (7.08–8.21) | ||||
| Depression | 1.24 | (1.15–1.32) | 1.23 | (1.15–1.32) | ||||
| Chronic obstructive pulmonary disease | 1.48 | (1.17–1.89) | 1.48 | (1.16–1.89) | ||||
| Tobacco use | 0.99 | (0.93–1.06) | 0.99 | (0.92–1.06) | ||||
| Rural residence | 0.99 | (0.94–1.05) | 0.99 | (0.94–1.05) | ||||
| Multiple births | 1.18 | (1.01–1.38) | 1.18 | (1.01–1.38) | ||||
CI, confidence interval; SMM, severe maternal morbidity.