Table 6 Results of analysis of covariance (ANCOVA) for global score of the Pittsburgh Sleep Quality Index as dependent variable.
| Source of variation | df | MSQ | F value | p value | |
|---|---|---|---|---|---|
| Covariates | Combined | 4 | 323.407 | 11.770 | 0.000 |
| Concerns about base station | 1 | 482.088 | 17.545 | 0.000 | |
| Age | 1 | 661.076 | 24.059 | 0.000 | |
| Sex | 1 | 87.286 | 3.177 | 0.076 | |
| Use of mobile phone | 1 | 63.176 | 2.299 | 0.130 | |
| Main effects | Combined | 3 | 42.571 | 1.549 | 0.202 |
| Area (rural/urban) | 1 | 57.795 | 2.103 | 0.148 | |
| GSM Exposure | 2 | 34.959 | 1.272 | 0.282 | |
| Interaction | 2 | 58.404 | 2.126 | 0.121 | |
Factors and covariables are shown in the column “source of variation”.
df, degrees of freedom; MSQ, mean sum of squares.