Table 2 Characteristics, clinical manifestations, blood lead levels and selected test results of the workers
From: Nerve excitability test and lead toxicity: a case-control study
Symptom | Lead content | Median MNCV | Evoked potential | NET | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
No | Age (yr) | BH (m) | S | M | BLL (µg/dL) | Exp. (yr) | Cumulative lead (µg/dL*yr) | DL (ms) | MNCV (m/s) | MEP latency (ms) | Stim. 50% max resp. (mA) | S1 (TEh20-40 ms) (%) | S3 (TEh90-100 ms) (%) |
1 | 35 | 1.53 | + | - | 38.7 | 8 | 309.6 | 3.05 | 56.00 | 24.86 | 4.31 | -101.09 | -133.25 |
2 | 48 | 1.75 | + | - | 40.3 | 14 | 564.2 | 3.75 | 56.30 | 25.14 | 7.15 | -85.22 | -117.87 |
3 | 47 | 1.69 | - | - | 35.9 | 23 | 825.7 | 3.80 | 56.10 | 23.71 | 4.17 | -90.67 | -120.16 |
4 | 48 | 1.60 | - | - | 33.7 | 2.5 | 84.25 | 5.25 | 55.20 | 23.57 | 6.59 | -103.27 | -155.06 |
5 | 52 | 1.55 | + | - | 21.3 | 3 | 63.9 | 4.60 | 50.60 | 22.00 | 4.61 | -83.28 | -91.67 |
6 | 50 | 1.64 | - | - | 43.3 | 22 | 952.6 | 3.90 | 49.50 | 27.29 | 6.70 | -95.92 | -142.78 |
7 | 61 | 1.58 | - | - | 20.6 | 5 | 103 | 3.40 | 55.30 | 22.29 | 5.37 | -101.69 | -130.87 |
8 | 55 | 1.62 | - | + | 33.5 | 23 | 770.5 | 3.05 | 57.60 | 22.29 | 3.59 | -96.02 | -131.15 |
9 | 54 | 1.69 | + | + | 17.8 | 21 | 373.8 | 4.10 | 57.10 | 22.86 | 4.88 | -78.09 | -103.74 |
10 | 54 | 1.58 | - | - | 64.9 | 18 | 1168.2 | 3.10 | 57.10 | 23.00 | 4.20 | -99.53 | -148.18 |
11 | 43 | 1.65 | - | - | 31.5 | 21 | 661.5 | 3.45 | 60.80 | 20.14 | 3.81 | -101.90 | -158.68 |
12 | 54 | 1.59 | - | - | 39.1 | 29 | 1133.9 | 2.70 | 56.00 | 22.57 | 4.51 | -103.88 | -147.34 |
13 | 54 | 1.63 | - | - | 47.8 | 29 | 1386.2 | 3.85 | 54.30 | 26.29 | 5.18 | -106.53 | -138.62 |
14 | 45 | 1.70 | - | - | 46.3 | 8 | 370.4 | 3.65 | 57.30 | 22.57 | 4.32 | -100.95 | -136.96 |