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Table 2 Changes in vigilance, state anxiety and self rated sleep quality before and after 9 days of yoga intervention

From: Changes in vigilance, self rated sleep and state anxiety in military personnel in India following yoga

Variables Yoga intervention
Before After t value χ2 value Cohen’s d/Cramer’s V P value
Vigilance scores 284.46 ± 45.98 307.15 ± 22.13 15.42 0.63b < 0.001
State anxiety scores 38.61 ± 9.68 30.98 ± 9.03 21.33 0.82b < 0.001
Time taken to fall asleep (min) 29.69 ± 21.22 20.27 ± 25.25 7.43 0.40b < 0.001
Total duration of nocturnal sleep (min) 276.68 ± 63.25 308.20 ± 51.02 11.54 0.55b < 0.001
Number of arousals during the night 1.34 ± 1.04 0.88 ± 0.85 11.18 0.48b < 0.001
Duration of daytime sleep (min) 72.86 ± 42.25 44.57 ± 35.89 15.66 0.72b < 0.001
Feeling of being rested in the morning (number of participants who reported ‘yes’)a 476 645 115.47 0.28c < 0.001
Sleeping in the day (number of participants who reported ‘yes’)a 599 504 39.78 0.17c < 0.001
  1. Values are group mean ± SD
  2. aThe remainder of the participants reported ‘No’
  3. bCohen’s d
  4. cCramer’s V