Table 2.
Distribution of selected demographic parameters among subjects recruited in the pilot phase of the Taizhou Longitudinal Study
| Exposure | Number of subjects (N = 17314) | Percentage |
| Use of air conditioning | 12412 | 71.28 |
| Use of microwave | 12454 | 71.52 |
| Use of computer | 3832 | 22.01 |
| Use of mobile phone | 3056 | 17.7 |
| Distance of current house from the main road (m) | ||
| <300 | 8403 | 48.25 |
| 300–1000 m | 4528 | 26.00 |
| Distance of current house from the factory (m) | ||
| <300 | 4003 | 22.99 |
| 300–1000 | 1853 | 10.64 |
| Moved into a new house during lifetime | ||
| Once | 8007 | 45.98 |
| ≥ Twice | 1245 | 7.15 |