Year-to-year variation in weather-epistaxis correlations: a pilot study for multi-year research design

Area of Science:

• Environmental Health
• Medical Research
• Statistical Analysis

Background:

• Conflicting correlations between weather and epistaxis (nosebleeds) exist in prior studies.
• Traditional combined analyses may obscure temporal patterns, leading to inconsistent research findings.
• Year-to-year variations, not geographic differences, may explain these discrepancies.

Purpose of the Study:

• To assess the annual stability of weather-epistaxis correlations.
• To establish a methodology for multi-year studies that accounts for temporal variations.
• To improve understanding of environmental health relationships in epistaxis.

Main Methods:

• A pilot study analyzed 2,201 epistaxis cases from two UK hospitals (2023-2024).
• Weather parameters were analyzed separately for each year to compare year-specific and combined approaches.
• Correlation stability and temporal variation effects were examined.

Main Results:

• Notable year-to-year differences in weather-epistaxis correlations were observed, though not statistically significant.
• Humidity correlations reversed direction (positive in 2023 to negative in 2024).
• Temperature and pressure correlations showed increased negative magnitudes over the study period, masked by combined analysis.

Conclusions:

• Year-to-year variations in weather-epistaxis correlations exist and can be masked by combined analyses.
• Extended observation periods (5-10 years) are recommended for future studies.
• Temporal variation is a significant factor in epistaxis research, necessitating robust methodologies.