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Table 1 Baseline characteristics of participants, laboratory, and electromyography findings

From: Long-term visual pathway alterations after elemental mercury poisoning: report of a series of 29 cases

 

Patients

n = 29

Controls

n = 16

p-value

Age, yrs. (mean, SD)

40.62 (8.05)

43.44 (8.30)

0.271

Smoking

18/29 (62.1%)

2/16 (12.5%)

0.001

Hypertension

2/29 (6.9%)

1/16 (6.25%)

>  0.05

Dyslipidemia

4/29 (13.8%)

2/16 (12.5%)

>  0.05

Psychiatric treatment

13/29 (44.8%)

–

–

Erethism

26/29 (89.7%)

–

–

Laboratory

Blood Hg (μg/L) (mean, SD)

392.93 (273.85)

–

–

Urine Hg (μg/g Cr) (mean, SD)

302.86 (405.36)

–

–

EMG patterns

Normal

1 (3.4%)

–

-

SP

14 (48.3%)

–

ASP

7 (24.1%)

–

MM

4 (13.8%)

–

N/A

3 (10.3%)

–

EMG CVA

SN (ms) (mean, SD)

33.5 (7.13)

a > 40

–

MN (ms) (mean, SD)

38.78 (6.65)

a > 49

  1. Data are presented as mean (SD) or as numbers
  2. Yrs. years, EMG electromyography, μg/L microgram/liter, μg/g Cr microgram per gram of creatinine, SP sensorimotor polyneuropathy, ASP axonal sensory polyneuropathy, MM multiple mononeuropathy, N/A not performed. EMG CVA Electromyography = conduction velocity assessment, SN Sensory nerve, MN Motor nerve, ms milliseconds
  3. aReference values (Stetson 1992; Sedano 2013) = normal velocity conduction in SN > 40 milliseconds. Normal velocity conduction in MN > 49 milliseconds
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Journal of Occupational Medicine and Toxicology

ISSN: 1745-6673