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Table 3 Urinary melatonin and cortisol levels in the groups during the night before surgery, and the first and second nights after surgery

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

Variables

Intervention group

Control group

 

Pre-surgery night

First night post surgery

Second night post surgery

P -value

Pre-surgery night

First night post surgery

Second night post surgery

P -value

6-SMT, ug

23.3 ± 24.3a

6.1 ± 9.9a

8.3 ± 12.6a

0.01

33.9 ± 99.9a

5.6 ± 12.7a

7.1 ± 9.8a

0.00

Cortisol, ug

10.3 ± 8.3b

95.9 ± 71.2b

82.5 ± 47.3b

0.00

13.8 ± 8.8b

82.9 ± 56.9b

74.9 ± 56.3b

0.00

  1. aNo significant differences were found between the two groups in 6-SMT levels during the night before surgery (P = 0.22), or the first (P = 0.61) and second postoperative nights (P = 0.97). bNo significant differences were found in cortisol levels between the two groups during the night before surgery (P = 0.33), or the first (P = 0.53) and second postoperative nights (P = 0.65).