Skip to main content
. 2023 Jan 19;11:14. doi: 10.1186/s40359-023-01042-4

Table 2.

Means and standard deviations of mental health variables

M SD Median Skewness Kurtosis Kolmogorov–Smirnov
d-statistic P value
PSS 23.22 6.54 23.00 − 0.19 − 0.35 0.067 0.001
GAD-7 10.57 5.48 10.00 0.13 − 0.87 0.091  < 0.001
PHQ-9 11.17 6.33 10.00 0.51 − 0.34 0.092  < 0.001
IES-22 31.20 18.67 28.00 0.40 − 0.47 0.073  < 0.001
PSQi 6.15 3.47 5.50 0.77 0.53 0.131  < 0.001
GQ-6 31.88 6.74 33.00 − 0.61 − 0.08 0.097  < 0.001

Perceived Stress Scale [PSS], Generalized Anxiety Disorder [GAD-7], Patient Health Questionnaire [PHQ-9] and Impact of Events Scale [IES-22] as well as Pittsburg Sleep Quality Index [PSQI] and Gratitude Questionnaire [GQ-6]