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Table 4 Association between season and outcome

From: Light and the outcome of the critically ill: an observational cohort study

Exposure Odds ratioa 95% CI P value
Seasonsa    
   Spring Referent   
   Summer 1.01 0.82-1.25 0.90
   Fall 1.08 0.88-1.33 0.46
   Winter 1.08 0.87-1.33 0.49
Seasonsb    
   Spring Referent   
   Summer 0.93 0.74-1.16 0.52
   Fall 1.35 1.01-1.81 0.04
   Winter 1.46 1.03-2.08 0.03
  1. aAdjusted for Acute Physiology and Chronic Health Evaluation (APACHE) III, age, sex, race, admission diagnosis, and intensive care unit (ICU) location. bAdjusted for APACHE III, age, sex, race, admission diagnosis, ICU location, and cumulative 28-day photoperiod. CI, confidence interval.