Semmelweis and the aetiology of puerperal sepsis 160 years on: an historical review
Level 4 - case-series / case-control
Historically controlled aggregate observational time-series study
OpenAlex W2116603573 · doi:10.1017/s0950268807008746
What was done
The authors performed a statistical analysis of historical mean annual maternal mortality percentages from 1784 to 1858, comparing records from the Allgemeines Krankenhaus (Vienna) and Dublin Maternity Hospitals. The analysis evaluated maternal mortality trends across key periods: the introduction of pathological anatomy (1823), the division into doctor- and student-staffed Clinic 1 and midwife-staffed Clinic 2 (post-1840), the introduction of chlorine handwashing in Clinic 1 (1847), and the cessation of handwashing after Semmelweis departed (post-1850).
What was found
The abstract reports directional associations without quantitative values, confidence intervals, or p-values: - The introduction of pathological anatomy in 1823 was associated with increased mortality. - Maternal mortality after 1840 was higher in Clinic 1 (where staff attended autopsies) than in Clinic 2 (staffed by midwives who did not). - The introduction of chlorine handwashing in Clinic 1 in 1847 reduced mortality. - The cessation of handwashing after 1850 was associated with increased mortality.
Why it matters
This study provides formal statistical re-analysis of Semmelweis's historical data, validating the empirical basis for his hypothesis on the transmission of puerperal sepsis.
Limits
The abstract reports no numerical values, exact effect sizes, or test statistics. As an analysis of aggregate 18th- and 19th-century hospital records, it lacks individual patient-level data, standardized diagnostic definitions, and control for unmeasured temporal confounders.
Cited by
- supports Ignaz Semmelweis discovered that handwashing significantly reduced the incidence of puerperal fever.