Table 3.
Summary of previous researches about simplification of sleep questionnaire.
| Study and abbreviation of questionnaire | Items | Version | |
|---|---|---|---|
| ISI | Wells et al.20: ISI-3 | Items 2, 3, and 5 | English |
| Thakral et al.21: ISI-3 | Items 2, 3, and 5 | English | |
| Kraepelien et al.16: ISI-2 | Items 2 and 3 | English | |
| ESS | Takegami et al.25: revised JESS | Replacing items 1 and 8 with new items | Japanese |
| Rosales-Mayor et al.23: ESS-MPV | Repalcing item 8 with an alternative item | Spanish | |
| Zhang et al.24: mESS | Repalcing item 8 with an alternative item | Mandarin | |
| etc | Nunzio et al.26: Berlin questionnaire | B1, (B6 or B7), D10 | English |