Table 7.
Summary results of NB tremor and tremor subtypes overall and across exposure categories
| Exposure Categories | Group Mean UHg* | Mean Age† | # Examined | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Exam Outcome | Overall | BEI | Low | Med | High | All groups | (+) vs null results | (+) vs null results | Exposed / Controls |
| NB Tremor (# pos. groups/# tested) | 59% (13/22) | 38% (3/8) | 50% (2/4) | 75% (3/4) | 83% (5/6) | 123 µg/L | 169 vs. 59 | 37 vs. 39 yrs | 1042/907 |
|
| |||||||||
| POSTURAL Tremor: | 65% (11/17) | 33% (2/6) | 67% (2/3) | 67% (2/3) | 100% (5/5) | 130 µg/L | 184 vs. 39 | 36 vs. 39 yrs | 847/726 |
| INTENTION Tremor: | 57% (4/7) | 50% (1/2) | 50% (1/2) | 67% (2/3) | NT | 80 µg/L | 81 vs. 77 | 36 vs. 35 yrs | 396/322 |
| KINETIC Tremor: | 12.5% (1/8) | 0% (0/4) | 0% (0/1) | 0% (0/1) | 50% (1/2) | 89 µg/L | 276 vs. 64 | 35 vs. 41 yrs | 387/353 |
*
= Comparison of weighted average of group mean UHg levels in study groups that were tested for tremor, and among study groups with positive vs. null tremor results.
NT=not tested.
†
= Weighted average of group mean age in study grouprs tested for tremor.