From: Quality of life, depression, and productivity of city government employees in Japan: a comparison study using the Athens insomnia scale and insomnia severity index
AIS
0–5
6–9
10–24
Total
%
ISI
0–7
862
141
7
1010
60.10%
8–14
174
295
92
561
33.40%
15–28
2
25
82
109
6.50%
1038
461
181
1680
100%
61.80%
27.40%
10.80%