Table 1.

Summary statistics on demographic variables stratified by the four primary job categories. The test statistic summarizes results from separate one-way ANOVA tests (and non-parametric Kruskal-Wallis test for “work days per week”) and Bonferroni-adjusted pairwise comparisons for tests with significant differences among job categories (p < 0.05; indicated in bold).

Variable		E-Waste Workers (n = 176)				Test Statistic
	Summary Statistic	Collectors (C; n = 73)	Dismantlers (D; n = 82)	Burners (B; n = 21)	Reference Group (RG; n = 41)
Age (years)		23.4 ± 0.73	26.4 ± 0.73	22.9 ± 0.88		F(3, 204) = 12.6, p < 0.001; RG > (C, D, B); D > C
	Min–Max	11–43	18–42	18–30	17–55
Years on the job	Mean ± SE	5.1 ± 0.66	7.6 ± 0.59	5.5 ± 0.68	8.5 ± 1.24	F(3, 207) = 4.05, p = 0.008; (RG, D) > C
	Min–Max	0.02–22.0	1.0–25.0	1.0–13.0	1.0–30.0
Hours per day	Mean ± SE	10.0 ± 0.26	9.8 ± 0.34	9.5 ± 0.59	10.2 ± 0.47	F(3, 210) = 0.325, p = 0.807
	Min–Max	1.0–14.0	1.0–14.0	2.0–12.0	2.0–15.0
Work days per week	Median ± IQR	6 ± 1	6 ± 1	6 ± 1	6 ± 1	χ2(3, 210) = 1.64, p = 0.650
	Min–Max	4–7	2–7	2–7	1–7