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Table 2 Influence of sleep quality by PSQI on IL-6, TNF-α and lymphocytes stratified by shift and daytime worker.

From: The impact of shift work induced chronic circadian disruption on IL-6 and TNF-α immune responses

Sleep quality Component Collective Mean SD p
PSQI < 6 IL-6 Daytime workers
Shift workers
2.31
2.67
1.59
3.31
0.357
  TNF-α Daytime workers
Shift workers
5.51
5.55
3.01
4.02
0.945
  Lymphocytes Daytime workers
Shift workers
33.98
33.12
7.60
7.44
0.453
PSQI ≥ 6 IL-6 Daytime workers
Shift workers
2.06
2.72
0.31
4.24
0.362
  TNF-α Daytime workers
Shift workers
5.54
5.73
2.06
6.07
0.853
  Lymphocytes Daytime workers
Shift workers
32.85
33.17
8.26
7.73
0.834