Table 4.
Electrocardiographic (ECG) conduction parameters for the exposed and unexposed groups in 2000 and 2006
| Exposed (n = 93) | Unexposed (n = 49) | t test | ||||||
|---|---|---|---|---|---|---|---|---|
| 2000 | 2006 | Difference | 2000 | 2006 | Difference | p value | ||
| PR time, ms # | Mean | 164.4 | 166.4 | 167.9 | 169.8 | |||
| SD | 24.5 | 23.6 | 25.8 | 24.3 | ||||
| QRS time, ms | Mean | 97.1 | 96.3 | − 0.8 | 99.4 | 96.7 | − 2.8 | 0.296 |
| SD | 10.3 | 11.9 | 10.6 | 8.8 | 13.3 | 10.6 | ||
| QTc time, ms | Mean | 408.3 | 408.7 | 0.4 | 410.8 | 410.0 | -0.8 | 0.762 |
| SD | 20.3 | 18.5 | 22.1 | 16.8 | 15.7 | 20.1 | ||
| QT time, ms | Mean | 417.7 | 399.3*** | − 18.4 | 416.1 | 414.7 | − 1.5 | 0.062 |
| SD | 37.8 | 33.4 | 43.6 | 64.0 | 35.2 | 62.0 | ||
| Pulse/min | Mean | 59.1 | 63.9*** | 4.8 | 58.0 | 60.3 | 2.3 | 0.173 |
| SD | 8.2 | 10.5 | 10.3 | 9.6 | 10.7 | 9.9 | ||
# 2006 values PQ time
Paired t test:*p < 0.05; **p < 0.01; ***p < 0.001