Percentages of “highly” annoyed/disturbed (“often” + “always”) subjects in each sound level category stratified by the prevalence of pre-existing diseases (PD)
| Item (categories 4+5) | Traffic noise level (dB(A)) | χ2 test | ||||
|---|---|---|---|---|---|---|
| 51–55 | 56–60 | 61–65 | 66–70 | Group | Trend | |
| +PD, −PD: subjects with and without pre-existing disease. | ||||||
| Annoyance | 2.1% | 6.1% | 8.8% | 10.3% | 0.000 | 0.000 |
| −PD | 1.7% | 4.6% | 5.3% | 10.1% | 0.000 | 0.000 |
| +PD | 2.8% | 8.6% | 13.9% | 10.5% | 0.000 | 0.000 |
| Concentration | 4.2% | 4.2% | 5.3% | 5.0% | 0.694 | 0.290 |
| −PD | 3.0% | 3.8% | 3.8% | 3.2% | 0.880 | 0.611 |
| +PD | 6.0% | 5.0% | 7.5% | 7.9% | 0.688 | 0.356 |
| Conversation, radio, TV | 3.3% | 3.7% | 7.1% | 5.0% | 0.001 | 0.001 |
| −PD | 2.8% | 3.4% | 5.7% | 3.7% | 0.092 | 0.052 |
| +PD | 4.1% | 4.3% | 9.1% | 7.0% | 0.021 | 0.008 |
| Relaxation | 3.0% | 2.6% | 3.5% | 6.0% | 0.045 | 0.023 |
| −PD | 2.6% | 1.7% | 2.6% | 2.1% | 0.819 | 0.645 |
| +PD | 3.6% | 4.3% | 4.8% | 12.3% | 0.000 | 0.000 |
| Nervous or tense | 2.4% | 2.6% | 2.9% | 3.6% | 0.640 | 0.217 |
| −PD | 1.8% | 2.1% | 2.6% | 1.6% | 0.818 | 0.731 |
| +PD | 3.4% | 3.6% | 3.2% | 7.0% | 0.274 | 0.186 |
| Falling asleep | 2.9% | 2.6% | 4.4% | 4.6% | 0.134 | 0.032 |
| −PD | 2.6% | 1.7% | 3.4% | 2.7% | 0.690 | 0.743 |
| +PD | 3.3% | 4.3% | 5.9% | 7.9% | 0.063 | 0.007 |
| Waking up | 3.4% | 4.5% | 5.1% | 6.3% | 0.044 | 0.005 |
| −PD | 3.3% | 2.5% | 5.3% | 3.7% | 0.323 | 0.301 |
| +PD | 3.7% | 7.9% | 4.8% | 10.5% | 0.003 | 0.002 |