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Table 5 Correlation between score of insomnia severity index, global PSQI Score and other variables

From: Sleep in post-COVID-19 recovery period and its impact on different domains of quality of life

  Score of insomnia severity index Global PSQI Score
  r p r p
Age 0.028 0.537 − 0.031 0.482
Days after recovery from COVID 19 0.985  ≤ 0.001* 0.897  ≤ 0.001*
Physical functioning − 0.840  ≤ 0.001* − 0.773  ≤ 0.001*
Role limitation due to physical health − 0.198  ≤ 0.001* − 0.186  ≤ 0.001*
Role limitation due to emotional problems − 0.164  ≤ 0.001* − 0.130 0.004*
Energy/ fatigue 0.010 0.828 0.013 0.772
Emotional well being 0.005 0.909 0.019 0.672
Social functioning 0.042 0.348 − 0.056 0.215
Pain 0.045 0.320 − 0.033 0.457
General health − 0.397  ≤ 0.001* − 0.384  ≤ 0.001*
Global PSQI Score − 0.888  ≤ 0.001*
  1. *Statistically significant results
  2. R reference group, F ANOVA test, t student t test, PSQI Pittsburgh sleep quality index