*3.4. E*ff*ect-Size Estimate*

We next used generalized linear model (GLM) analysis to quantify effects of parental occupation on blood Pb levels and body mass index (BMI) of children. Figure 1A shows blood Pb levels in boys and girls of parents with and without an occupation in producing fishing nets with lead weights. Age-adjusted mean ± SE values for blood Pb in boys and girls of parents with the occupation of making fishing nets of 6.22 ± 0.50 and 6.72 ± 0.49 μg/dL were respectively 2.3 and 2.5 times higher than the same age-adjusted mean ± SE in boys (2.67 ± 0.27) and girls (2.68 ± 0.28) of parents with other occupations (*p* < 0.001 for boys and girls, Bonferroni test).

**Figure 1.** Blood Pb levels and BMI stratified by gender and parent occupation. Bars in (**A**) represent age-adjusted mean ± standard error of mean (SE) for blood Pb levels, while bars in (**B**) represent age-adjusted BMI ± SE in boys and girls from parents with and without an occupation of producing fishing nets with lead weights. \* *p* values ≤ 0.05 identify statistical significance.

Of interest, Figure 1B indicated an effect of parental occupation on BMI in girls only. Age-adjusted mean ± SE values for BMI were 17.74 ± 0.53 kg/m<sup>2</sup> in girls of parents with the occupation of producing fishing nets and 16.12 ± 0.54 kg/m<sup>2</sup> in girls of parents with occupations other than making fishing nets (*p* < 0.035, Bonferroni test). On average, girls of parents with the occupation of producing fishing nets had a 9.1% higher BMI than the girls of parents of other occupations.
