Paternal race/ethnicity and birth outcomes
1Pardee Rand Graduate School, Johns Hopkins School of Public Health, Baltimore, MD, USA. sma@jhsph.edu
Insights
Paternal race/ethnicity has a smaller impact on infant birth outcomes than maternal race/ethnicity. Non-racial factors and unreported paternal information significantly influence disparities in infant health.
Area of Science:
- Reproductive Health
- Perinatal Epidemiology
- Sociodemographic Factors in Health
Background:
- Maternal race/ethnicity is often used as a proxy for infant race/ethnicity in research.
- Existing research may overlook the independent contributions of paternal race/ethnicity to birth outcomes.
- Understanding the interplay of parental race/ethnicity is crucial for addressing health disparities.
Purpose of the Study:
- To investigate the association between paternal race/ethnicity and infant birth outcomes.
- To compare outcomes among infants of same-race/ethnicity parents versus mixed-race/ethnicity parents.
- To determine if disparities attributed to race/ethnicity are confounded by other parental characteristics.
Main Methods:
- Utilized the 2001 National Center for Health Statistics linked birth and infant death file.
- Employed propensity score matching and weighting to control for confounding variables.
- Analyzed birth outcomes stratified by maternal race/ethnicity and paternal race/ethnicity.
Main Results:
- Significant variations in birth outcomes were observed based on paternal race/ethnicity among infants with White mothers.
- Propensity score weighting indicated that non-racial parental characteristics largely explained racial/ethnic disparities.
- Infants with unreported paternal race/ethnicity exhibited the poorest birth outcomes.
Conclusions:
- Relying solely on maternal race/ethnicity to represent infant race/ethnicity in research is methodologically flawed.
- Maternal race/ethnicity demonstrated a larger estimated effect on birth outcomes compared to paternal race/ethnicity after covariate adjustment.
- Unreported paternal information on birth certificates is a potential source of bias and a marker for identifying at-risk infants.
Objectives:
I sought to identify whether there were associations between paternal race/ethnicity and birth outcomes among infants with parents of same- and mixed-races/ethnicities.
Methods:
Using the National Center for Health Statistics 2001 linked birth and infant death file, I compared birth outcomes of infants of White mothers and fathers of different races/ethnicities by matching and weighting racial/ethnic groups following a propensity scoring approach so other characteristics were distributed identically. I applied the same analysis to infants of Black parents and infants with a Black mother and White father.
Results:
Variation in risk factors and outcomes was found in infants of White mothers by paternal race/ethnicity. After propensity score weighting, the disparities in outcomes by paternal or parental race/ethnicity could be largely attributed to nonracial parental characteristics. Infants whose paternal race/ethnicity was unreported on their birth certificates had the worst outcomes.
Conclusions:
The use of maternal race/ethnicity to refer to infant race/ethnicity in research is problematic. The effects of maternal race/ethnicity on birth outcomes are estimated to be much larger than that of paternal race/ethnicity after I controlled for all covariates. Not listing a father on the birth certificate had a strong association with outcomes, which might be a source of bias in existing data and a marker for identifying infants at risk.
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