Table 5.

Crude and adjusted association between health condition category and maternal outcomes, Massachusetts Births, 2007–2009

	Crude RR (95% CI)	Adjusted Demographics RR (95% CI)	Adjusted demographics and pregnancy risks RR (95% CI)
Maternal delivery hospitalization > 5 days
Circulatory	4.8 (4.4–5.2)	4.5 (4.1–4.9)	1.9 (1.7–2.0)
Musculoskeletal	2.0 (1.6–2.4)	1.9 (1.5–2.3)	1.5 (1.2–1.9)
Nervous system/ sense organ	2.0 (1.7–2.3)	2.0 (1.7–2.4)	1.6 (1.4–2.0)
Other physical	3.1 (2.8–3.5)	3.0 (2.7–3.4)	2.3 (2.1–2.6)
Mental Illness	1.6 (1.3–1.8)	1.7 (1.4–2.0)	1.5 (1.3–1.8)
Mental + physical	4.0 (3.4–4.9)	4.3 (3.6–5.2)	3.0 (2.5–3.6)
2+ physical	6.0 (5.1–7.0)	5.9 (5.1–6.9)	3.0 (2.5–3.5)
Cesarean Section
Circulatory	1.4 (1.4–1.5)	1.4 (1.3–1.4)	1.2 (1.2–1.3)
Musculoskeletal	1.1 (1.1–1.2)	1.1 (1.1–1.2)	1.1 (1.0–1.2)
Nervous system/ sense organ	1.1 (1.1–1.2)	1.2 (1.1–1.2)	1.1 (1.1–1.2)
Other physical	1.4 (1.3–1.4)	1.4 (1.3–1.4)	1.3 (1.3–1.4)
Mental Illness	1.0 (1.0–1.1)	1.1 (1.1–1.2)	1.1 (1.0–1.1)
Mental + physical	1.2 (1.1–1.3)	1.3 (1.2–1.4)	1.2 (1.1–1.3)
2+ physical	1.5 (1.4–1.6)	1.5 (1.4–1.6)	1.3 (1.2–1.4)

RR: Risk Ratio; CI: Confidence Interval