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Table 3 Levels of urinary δ-ALA by age group

From: Lead exposure study among workers in lead acid battery repair units of transport service enterprises, Addis Ababa, Ethiopia: a cross-sectional study

Age δ-ALA (μg/ml) ± SEM
  Non-Exposed Exposed
20–35 7.3 ± 2.2 6.1 ± 2.2***
36–45 6.7 ± 1.2 12.4 ± 3.2***
46+ 6.8 ± 1.4 21.7 ± 2.5***
  1. Urinary ALA levels determined as described in the legend of Fig. 1 were compared between similar age groups of exposed and non-exposed subjects. Data were analyzed using F-ANOVA. ***P < 0.001.