Sustainability and Social Justice

Using Space–Time Cube to Analyze Trends in Adverse Birth Outcomes and Maternal Characteristics in Massachusetts, USA

Document Type

Article

Abstract

Rates of preterm births (< 37 gestational weeks) and low birthweight (≤ 2500 g) are rising throughout the United States. This study uses singleton live birth data, Empirical Bayes approach, space–time cube and Mann–Kendall statistic to evaluate temporal trends in these adverse birth outcomes (ABO) and maternal characteristics over 15 years (2000–2014) at the census tract level for non-Hispanic white and black women in Massachusetts. In addition to analyzing trends for each variable individually, the study analyzes spatial coincidence of trends to determine which maternal characteristics exhibited trends that most strongly correlated with the ABO trends. The 15-year average rate of ABO was 7.34% for white women, and 12.05% for black women. Results show that more census tracts exhibited an increasing trend than decreasing trend in birth outcomes and in several maternal characteristics for both races (gestational and chronic hypertension, gestational diabetes, and previous preterm birth). Study identified 52 census tracts concurrently experiencing an increasing trend in ABO and in four maternal characteristics for black women, indicating that multiple negative trends in health outcomes are concentrated at the same location creating a potential for even more adverse outcomes in the future. This study provides a novel, spatially explicit analytical framework based on Empirical Bayes rates and space–time cube, which could be extended to analyze trends in other health outcomes at various spatial scales.

Publication Title

GeoJournal

Publication Date

8-1-2022

Volume

87

Issue

4

First Page

2491

Last Page

2504

ISSN

0343-2521

DOI

10.1007/s10708-021-10382-w

Keywords

adverse birth outcomes, low birthweight, Mann–Kendall, maternal health, preterm birth, space–time cube

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