. 2020 Apr 7;8(2):89. doi: 10.3390/healthcare8020089

Table 7.

Descriptive statistics, communality, item-discrimination, factor loadings of the Athens Insomnia Scale (AIS) among occupational computer users in India.

Items of the AIS	Skewness	Kurtosis	Cronbach’s Alpha If Item Deleted	Item-Total Correlation	Corrected Item-Total Correlation	Percentage Distribution Across Item Scores
Items of the AIS	Skewness	Kurtosis	Cronbach’s Alpha If Item Deleted	Item-Total Correlation	Corrected Item-Total Correlation	0	1	2	3
Sleep induction	0.62	0.57	0.66	0.56 **	0.26	40.8	52.6	5.7	0.9
Awakenings during night	1.34	1.60	0.59	0.59 **	0.47	65.4	30.7	3.3	0.5
Final awakening earlier	1.17	0.88	0.66	0.50 **	0.22	64.9	32.1	2.6	0.2
Total sleep duration	1.71	3.15	0.57	0.62 **	0.53	72.4	25.2	1.9	0.5
Sleep quality	2.30	5.95	0.58	0.59 **	0.52	79.7	17.9	1.9	0.5
Daytime wellbeing	2.79	5.79	0.64	0.37 **	0.34	79.5	17.9	1.9	0.5
Daytime functioning capacity	4.09	19.28	0.63	0.38 **	0.33	79.5	17.9	1.9	0.5
Daytime sleepiness	0.93	0.85	0.66	0.44 **	0.23	59.0	39.4	1.2	0.5

D: Standard deviation; SE: Standard Error. AIS: Athens Insomnia Scale. ** p < 0.01. Cronbach’s alpha for the AIS: 0.66.