A German study investigated the inhouse radiation levels among about 400 families and collected variouse health parameters. One parameter was related to sleeping quality and is plotted below as a function of the radiation levels recorded.
Figure 1. Sleeping problems vs. radiation levels.
The radiation was measured in the frequency range 900 MHz to 2.5 GHz. Reported data were grouped from <10 to >1000 µW/m2. These numbers have here been transformed into dBuV/m.
The full study can be downloaded.