Skip to main content
. Author manuscript; available in PMC: 2017 May 1.
Published in final edited form as: Am J Obstet Gynecol. 2015 Dec 2;214(5):661.e1–661.e10. doi: 10.1016/j.ajog.2015.11.030

Appendix 2.

Determinants of Rural Women Giving Birth in a Non-Local Hospital (N=219,007, Including Transferred Women)

Adjusted Odds Ratio (95% Confidence Interval) Average Marginal Effects (%) P-value

MATERNAL CLINICAL CONDITION
Conditions Which May Require Maternal Fetal Medicine Services or Consultation 1.31 (1.2, 1.43) 5.8% <.001
Malposition, Malpresentation 1.22 (1.16, 1.29) 4.1% <.001
Multiple Gestation 1.94 (1.76, 2.15) 14.3% <.001
Pregnancy Delivered Before 37 Weeks Gestation 2.58 (2.26, 2.96) 21.0% <.001
Previous Cesarean Section 1.25 (1.2, 1.31) 4.5% <.001

MATERNAL CHARACTERISTICS
Age
    Age ≤20 0.77 (0.73, 0.83) −4.3% <.001
    21≤Age≤25 0.89 (0.86, 0.93) −2.0% <.001
    26≤Age≤30 Ref - -
    31≤Age≤35 1.06 (1.02, 1.09) 1.0% 0.002
    Age≥36 1.14 (1.08, 1.2) 2.4% <.001

Primary Payer
    Medicaid 0.73 (0.66, 0.8) −5.6% <.001
    Private Ref - -
    Self 0.89 (0.68, 1.15) −2.2% 0.357
    Other 0.92 (0.76, 1.11) −1.5% 0.404

Race/Ethnicity
    White Ref - -
    Black 0.64 (0.45, 0.91) −7.1% 0.012
    Hispanic 0.71 (0.58, 0.88) −5.5% 0.002
    Native American, Asian, Other 1.22 (0.95, 1.57) 3.7% 0.117

Patient Residence Rurality
    Micropolitan area Ref - -
    Noncore adjacent to a metro area 2.24 (1.68, 2.97) 13.9% <.001
    Noncore not adjacent to a metro area 1.58 (1.12, 2.24) 7.9% 0.01

LOCAL HOSPITAL CHARACTERISTICS

Neonatal Care Capacity
    Any Neonatal Intensive Care Units Ref - -
    Neonatal Intermediate Care Units Only 1.98 (1.33, 3.09) 4.6% 0.005
    No NICU or NINT 2.65 (1.96, 3.64) 20.6% <.001

Local Hospital(s) with:
Accreditation 0.8 (0.52, 1.24) −4.0% 0.317
System Affiliation 0.94 (0.68, 1.31) −1.0% 0.732