<p>R code for statistical analysis.</p>

R code for analyzing long-term maternal mortality associated with placental abruption and retention. The analysis is based on a cohort of 638,911 vaginal deliveries, with mortality rates of 6.4, 9.8, and 12.0 per 1,000 for normal, abruption, and retention groups, respectively. The code, authored by Sona Jasani and last updated in April 2026, performs statistical modeling to evaluate hazard ratios and temporal mortality patterns.

Use Cases

• Replicate hazard ratio calculations for placental retention and abruption based on the described cohort and demographic factors.
• Perform piecewise Cox regression to analyze temporal mortality patterns following abnormal placental separation.
• Conduct statistical analysis controlling for demographic factors like age, race, and social determinants of health.
• Study the association between specific health outcomes and either abruption, retention, or both abnormal placental separation groups.

Strengths

• Analysis is based on a large cohort of 638,911 vaginal deliveries.
• Provides specific mortality rates (6.4, 9.8, 12.0 per 1,000) and hazard ratios (e.g., HR 1.95 for retention) with confidence intervals.
• Code is openly licensed under CC-BY-4.0, facilitating reuse and adaptation.

Limitations

• The dataset is very small (28.4 KB), indicating it contains only code, not the underlying patient-level data.
• Row count and column-level documentation for any potential accompanying data are unknown.
• The description metadata does not specify the source institution or geographic scope of the original cohort data.

Provenance

Source

Sona Jasani

Collection Method

Statistical analysis code for a cohort study, likely derived from hospital or health system records.

Time Range

Temporal coverage of the underlying cohort data is not specified.

Freshness

Last updated 2026-04 24 17:28:54

Geography

Geographic coverage of the underlying cohort data is not specified.