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Table 1 Baseline characteristics

From: Impact of natural light exposure on delirium burden in adult patients receiving invasive mechanical ventilation in the ICU: a prospective study

Variable All (n = 195) Dark (n = 85) Light (n = 110) p
Demographics
 Age, years 60 (50–69) 61 (51–68) 60 (48–70) 0.85
 Male gender 135 (69) 58 (68) 77 (70) 0.79
History
 Immunodepression 25 (13) 12 (14) 13 (12) 0.64
 Chronic antipsychotic use 13 (7) 6 (7) 7 (6) 0.84
 Hypertension 93 (48) 38 (45) 55 (50) 0.46
 Current smoking 68 (35) 31 (36) 37 (34) 0.68
 COPD 37 (19) 20 (24) 17 (15) 0.15
 Drug abuse 10 (5) 5 (6) 5 (5) 0.67
 Benzodiazepine use 31 (16) 12 (14) 19 (17) 0.55
 Cirrhosis 14 (7) 5 (6) 9 (8) 0.54
 Alcohol abuse 46 (24) 24 (28) 22 (20) 0.18
 Diabetes 45 (23) 18 (21) 27 (25) 0.58
 Mild cognitive impairment 2 (1) 0 (0) 2 (2) 0.21
 Charlson comorbidity index 2 (1–4) 2 (1–4) 2 (1–4) 0.20
Medical admission 134 (69) 52 (61) 82 (75) 0.05
Sepsis at admission 124 (64) 54 (64) 70 (64) 0.99
SOFA score 9 (7–11) 8 (6–11) 9 (7–11) 0.22
SAPS 2 51 (36–64) 52 (36–61) 50 (36–65) 0.64
ICU admission diagnosis
 Respiratory failure or sepsis 105 (54) 46 (54) 59 (54) 0.85
 Cardiogenic shock 32 (16) 13 (15) 19 (17) 0.71
 Cardiothoracic surgery 26 (13) 13 (15) 13 (12) 0.48
 Other 32 (16) 13 (15) 19 (17) 0.71
  1. Data are median (interquartile range) or numbers (percentage)
  2. COPD chronic obstructive pulmonary disease, SOFA Sepsis Organ Failure Assessment, SAPS 2 Simplified Acute Physiology Score 2