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Table 1 Patients demographic characteristics

From: Effects of earplugs and eye masks combined with relaxing music on sleep, melatonin and cortisol levels in ICU patients: a randomized controlled trial

Variable Control group (n = 25) Intervention group (n = 20) P - value
Age, years, mean ± SD 56.8 ± 11.2 56.6 ± 11 0.97
Gender, number of patients    0.5
Male 16 11  
Female 9 9  
Weight, kg, mean ± SD 61.6 ± 11.7 60.5 ± 12.9 0.6
Surgery, number of patients    
CABG 4 3 0.94
Cardiac value replacement 17 13  
Congenital heart disease 4 4  
Operative time, hours, mean ± SD 3.3 ± 1.2 3.3 ± 0.7 0.96
Cardiopulmonary bypass, number of patients    
Yes 19 14 0.7
No 6 6  
APACHE II scores on admission, mean ± SD 20 ± 3.1 21.2 ± 2.9 0.75
Preoperative cardiac function score, number of patients    
П 3 3 0.6
Ш 21 17  
IV 1 0  
Duration of mechanical ventilation, hours, mean ± SD 22 ± 10.1 22.7 ± 9.5 0.8
Length of ICU stay, hours, mean ± SD 58.9 ± 20 53.0 ± 16 0.29
Length of hospital stay, days, mean ± SD 22.6 ± 10.8 20.7 ± 6.1 0.5
Preoperative PSQI, mean ± SD 7.5 ± 3.7 8.6 ± 4.5 0.3
Discharge outcomes of hospital, number of patients    
No death 23 20 0.4
mortality 2 0  
  1. CABG, coronary artery bypass surgery; PSQI, Pittsburgh sleep quality index; APACHE, acute physiology and chronic health evaluation scoring system.