Table 4 Intercorrelations of the items on the Jenkins Sleep Scale (JSS) and convergent validity of the Athens Insomnia Scale (AIS) and Pittsburgh Sleep Quality Index (PSQI) (n = 420)
| Â | JSS-1 | JSS-2 | JSS-3 | JSS-4 | JSS Total | AIS | PSQI |
|---|---|---|---|---|---|---|---|
JSS-1 | — |  |  |  |  |  |  |
JSS-2 | 0.31** | — |  |  |  |  |  |
JSS-3 | 0.54** | 0.45** | — |  |  |  |  |
JSS-4 | 0.46** | 0.31** | 0.46** | — |  |  |  |
JSS Total | 0.75** | 0.69** | 0.80** | 0.76** | — |  |  |
AIS | 0.55** | 0.48** | 0.60** | 0.59** | 0.74** | — |  |
PSQI | 0.64** | 0.54** | 0.62** | 0.61** | 0.80** | 0.59** | — |