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Table 3 Adjusted relative risks (RR) for preterm birth and low birth weight associated with black jail incarceration

From: Mass incarceration and public health: the association between black jail incarceration and adverse birth outcomes among black women in Louisiana

VariableCategoriesPreterm Birth
Model A
RR (95% CI)a
p valueLow Birth Weight
Model B
RR (95% CI)
p value
Black jail incarceration prevalence (per IQRb increase) 1.03 (1.00–1.06).02691.02 (.99–1.05).1148
Maternal age< 201.06 (.92–1.21).41451.08 (.95–1.22).2344
20–24Reference
25–291.03 (.96–1.10).4537.93 (.83–1.04).2043
30+1.22 (1.12–1.33)<.00011.11 (1.00–1.23).0471
InsuranceMedicaid.99 (.91–1.08).81861.08 (.98–1.19).1321
PrivateReference
Other1.43 (1.15–1.78).00131.38 (1.22–1.57)<.0001
Prenatal care utilization indexcInadequate1.99 (1.77–2.23)<.00011.69 (1.53–1.86)<.0001
Intermediate1.58 (1.34–1.86)<.00011.45 (1.29–1.64)<.0001
AdequateReference
Adequate +2.65 (2.40–2.91)<.00012.14 (1.95–2.35)<.0001
ParityNulliparousReference
Multiparous.82 (.78–.87)<.0001.99 (.92–1.07).8187
UrbanicityMostly UrbanReference
Mostly Rural1.11 (.94–1.31).22611.14 (1.01–1.29).0335
Completely Rural1.19 (.82–1.73).36841.16 (.88–1.54).2945
White – black median household income difference .99 (.90–1.10).9531.03 (.95–1.11).5088
Gini index .79 (.16–3.89).7795.59 (.24–1.48).268
Black educational attainmentd 1.45 (.60–3.49).40881.70 (.69–4.16).2449
  1. a 95% Confidence Interval
  2. b IQR – Interquartile Range
  3. c Kotelchuck Adequacy of Prenatal Care Utilization Index
  4. d Percent of the non-Hispanic black population age 25 and older with a bachelor’s or higher degree