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Table 6 Results of Cox proportional hazards regression analysis

From: Linking the severity of illness and the weekend effect: a cohort study examining emergency department visits

  Number (N) Mortality (%) Crude mortality rate (95% CI) Adj. mortality rate (95% CI)* P value**
Weekday (From 7.00 am on Monday to 2.59 p.m. on Friday)
 Daytime (7.00 a.m. – 2.59 p.m.) 9257 2.8% 1 (reference) 1 (reference)  
 Evening (3.00 p.m. – 10.59 p.m.) 4371 3.0% 1.08 (0.88–1.34) 1.20 (0.95–1.52) 0.131
 Nighttime (11.00 p.m. – 6.59 a.m.) 972 3.5% 1.27 (0.89–1.82) 0.87 (0.57–1.32) 0.514
Weekend (From 3.00 p.m. on Friday to 6.59 a.m. on Monday)
 Daytime (7.00 a.m. – 2.59 p.m.) 2234 3.4% 1.25 (0.97–1.61) 1.08 (0.80–1.46) 0.603
 Evening (3.00 p.m. – 10.59 p.m.) 3526 3.3% 1.20 (0.96–1.49) 1.32 (1.03–1.70) 0.027
 Nighttime (11.00 p.m. – 6.59 a.m.) 1376 3.5% 1.27 (0.93–1.72) 1.29 (0.90–1.84) 0.169
  1. *Adjusted for age groups, gender, comorbidity burden, triage score, and whether the patients had or had not previous admissions to the emergency department within the two-year period included in the study
  2. **For the adjusted mortality rate