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Table 5 Adjusted cumulative intensive care unit insolation according to season

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

Insolation Season P value
  Spring Summer Fall Winter  
At 24 hours 0.006 ± 0.004 0.007 ± 0.004 0.003 ± 0.002 0.003 ± 0.002 <0.001
At 48 hours 0.015 ± 0.006 0.018 ± 0.005 0.008 ± 0.004 0.008 ± 0.003 <0.001
At 72 hours 0.023 ± 0.007 0.027 ± 0.007 0.012 ± 0.005 0.012 ± 0.005 <0.001
  1. Values are expressed as mean ± standard error of the mean. Insolation is expressed in kilowatt hours per square meter.