Table 7.
Associations between RF-EMF exposures and being ‘Tired at school’ (symptom)
| Symptom | Symptom categories (N for unadjusted model/N for adjusted model) | Exposure | Exposure categories (N for unadjusted model/N for adjusted model) | Unadjusted OR (95% CI) for each exposure category | Adjusted OR (95% CI) for each exposure category | Confounders in model |
|---|---|---|---|---|---|---|
| Tired at school |
No, hardly ever (-//61) |
Cordless calls >10 minutes weekly |
0 (-/60) |
Model invalid |
1 |
Woken by phone**+ |
| 1 or 2 weekly (-/153) |
1-2 (-/101) |
1.17 (0.81-1. 69) |
Age- |
|||
| 3 or 4 weekly (-/41) |
3-9 (-/80) |
0.73 (0.50-1.07) |
Cold/flu |
|||
| Most days (-/64) |
10-120 ( -/78) |
0.90 (0.60-1.34) |
||||
| Tired at school |
No, hardly ever (-/73) |
Minutes on cordless phone daily |
0-4 (-/137) |
Model invalid |
1 |
Woken by phone **+ |
| 1-2 times weekly (-/144) |
5-15 (-/100) |
0.82 (0.86-1.14) |
Cold/flu*+ |
|||
| 3+ times weekly (-/114) |
16-240 (-/94) |
0.79 (0.55-1.12) |
Light out time |
|||
| Tired at school |
No, hardly ever (-/74) |
Cellphone calls >10 minutes weekly |
0 (-/270) |
Model invalid |
1 |
Woken by phone**+ |
| 1 or 2 times weekly (-/155) |
1-6 (-/65) |
1.26 (0.75-2.10) |
Cold/flu+ |
|||
| 3 or 4 times weekly (-/46) |
7-35 (-/12) |
0.72 (0.23-2.25) |
Decile+ |
|||
| Most of the time (-/72) | ||||||
| Tired at school |
No (-/34) |
Cordless phone frequency |
Not exposed (-/26) |
Model invalid |
1 |
Cold/flu*+ |
| 1-4 days weekly (-/78) |
≤ 900 MHz (-/20) |
1.26 (0.59-2.70) |
Light out time + |
|||
| Most days (-/30) |
1.8-1.9 GHz (-/25) |
1.92 (0.93-3.96) |
Use phone headset |
|||
| 2.4 GHz (-/53) |
1.01 (0.55-1.87) |
Woken at night |
||||
| 5.8 GHz (-/18) |
1.79 (0.83-3.87) |
TV in bedroom |
||||
| Tired at school |
No, hardly ever (35/32) |
Cordless phone system |
Not exposed (29/25) |
1 |
1 |
Light out time + |
| 1-4 days weekly (75/71) |
DECT (51/50) |
1.30 (0.73-2.33) |
1.09 (0.57-2.11) |
Use phone headset |
||
| Most days (27/26) |
DSS (27/25) |
2.50 (1.30-4.80)* |
2.53 (1.21-5.31)* |
Woken at night |
||
| Analogue (30/29) |
1.51 (0.80-2.87) |
1.24 (0.60-2.58) |
Cold/flu |
|||
| TV in bedroom | ||||||
| Tired at school |
No, hardly ever (-/75) |
Cellphone headset |
No (-/318) |
Model invalid |
1 |
Woken by phone**+ |
| 1 or 2 times weekly (-/155) |
Wired (-/16) |
1.11 (0.42, 2.93) |
Cold/flu*+ |
|||
| 3 or 4 times weekly (-/47) |
Wireless (-/13) |
1.38 (0.47, 4.04) |
Decile+ |
|||
| Most days (-/70) | Light out time |
Bold font Sig. p < 0.05; *Sig. p ≤ 0.01; **Sig. p ≤ 0.001; + positive association; - negative association; ‘Model invalid’ means it did not meet the criteria outlined in the methods.