Table 5.
Results of the logistic regression models by measured and self-reported exposure for adolescents
| Symptoms | Quartile | Prevalence N (%) |
OR (95% CI)# | Prevalence N (%) |
OR (95% CI)# |
|---|---|---|---|---|---|
| Noon | Measured exposure during morning hours | > 5 minutes mobile phone use during morning hours* | |||
| Headache | 1st | 89 (23.7) | 1.00 | 54 (35.1) | 1.55 (1.05 -2.29) |
| 2nd | 96 (25.9) | 1.08 (0.75 -1.56) | |||
| 3rd | 104 (28.3) | 1.19 (0.83 -1.73) | |||
| 4th | 112 (30.5) | 1.50 (1.03 -2.19) | |||
| Irritation | 1st | 68 (18.3) | 1.00 | 50 (32.9) | 1.64 (1.10 -2.44) |
| 2nd | 95 (25.5) | 1.05 (0.71 -1.54) | |||
| 3rd | 86 (23.4) | 1.08 (0.73 -1.59) | |||
| 4th | 97 (26.5) | 1.44 (0.97 -2.15) | |||
| Nervousness | 1st | 35 (9.4) | 1.00 | 25 (16.2) | 1.30 (0.79 -2.14) |
| 2nd | 45 (12.1) | 1.17 (0.72 -1.91) | |||
| 3rd | 42 (11.4) | 1.13 (0.68 -1.87) | |||
| 4th | 66 (18.0) | 1.39 (0.84 -2.30) | |||
| Dizziness | 1st | 55 (14.7) | 1.00 | 30 (19.5) | 1.24 (0.78 -1.97) |
| 2nd | 57 (15.4) | 1.07 (0.68 -1.68) | |||
| 3rd | 58 (15.7) | 1.33 (0.85 -2.07) | |||
| 4th | 70 (19.1) | 1.34 (0.84 -2.11) | |||
| Concentration | 1st | 99 (26.5) | 1.00 | 49 (32.0) | 1.28 (0.86 -1.89) |
| problems | 2nd | 117 (31.5) | 0.99 (0.70 -1.41) | ||
| 3rd | 107 (29.0) | 0.72 (0.50 -1.04) | |||
| 4th | 106 (29.0) | 0.99 (0.69 -1.43) | |||
| Fatigue | 1st | 156 (41.7) | 1.00 | 90 (58.4) | 1.76 (1.22 -2.56) |
| 2nd | 180 (48.4) | 0.98 (0.71 -1.35) | |||
| 3rd | 195 (53.4) | 1.01 (0.73 -1.40) | |||
| 4th | 199 (54.2) | 1.37 (0.97 -1.93) | |||
| Evening | Measured exposure during afternoon hours | > 5 minutes mobile phone use during afternoon* | |||
| Headache | 1st | 84 (22.3) | 1.00 | 65 (30.7) | 1.30 (0.92 -1.85) |
| 2nd | 89 (23.9) | 1.44 (1.00 -2.08) | |||
| 3rd | 87 (23.5) | 1.04 (0.71 -1.53) | |||
| 4th | 104 (28.0) | 1.39 (0.94 -2.05) | |||
| Irritation | 1st | 88 (23.4) | 1.00 | 63 (29.7) | 1.14 (0.81 -1.62) |
| 2nd | 98 (26.1) | 1.17 (0.82 -1.69) | |||
| 3rd | 104 (28.0) | 1.37 (0.95 -1.98) | |||
| 4th | 111 (30.0) | 1.79 (1.23 -2.61) | |||
| Nervousness | 1st | 52 (13.8) | 1.00 | 37 (17.5) | 1.18 (0.77 -1.82) |
| 2nd | 60 (16.1) | 1.15 (0.74 -1.78) | |||
| 3rd | 53 (14.4) | 1.08 (0.68 -1.69) | |||
| 4th | 61 (16.5) | 1.39 (0.88 -2.20) | |||
| Dizziness | 1st | 48 (12.8) | 1.00 | 32 (15.2) | 0.96 (0.62 -1.51) |
| 2nd | 55 (14.8) | 1.04 (0.65 -1.65) | |||
| 3rd | 48 (13.0) | 1.37 (0.87 -2.16) | |||
| 4th | 69 (18.7) | 1.54 (0.96 -2.45) | |||
| Concentration problems | 1st | 126 (33.7) | 1.00 | 75 (35.4) | 0.93 (0.67 -1.29) |
| 2nd | 130 (34.9) | 1.17 (0.84 -1.61) | |||
| 3rd | 136 (36.8) | 1.15 (0.83 -1.60) | |||
| 4th | 135 (36.7) | 1.08 (0.77 -1.53) | |||
| Fatigue | 1st | 272 (72.5) | 1.00 | 150 (70.8) | 0.91 (0.64 -1.29) |
| 2nd | 266 (71.1) | 0.91 (0.64 -1.30) | |||
| 3rd | 264 (71.2) | 0.91 (0.63 -1.30) | |||
| 4th | 256 (69.0) | 0.93 (0.64 -1.35) | |||
* Reference category: self-reported usage of mobile phone ≤ 5 minutes during the morning or afternoon hours
#OR = Odds ratio; 95% CI = 95% Confidence Interval; Adjusted for age, sex, level of education, study town, environmental worries