Test | Exposure setting | Cohorts included (listed in table 2) | N | Effect size | 95% CI | Homogeneity by group (p value)‡ | Homogeneity between groups (p value)§ |
Benton Visual Retention Test | Farmworkers | 3, 4, 9 | 253 | −0.72** | −0.99 to −0.45 | 0.03 | 0.9 |
Applicators | 1, 2, 5, 19 | 361 | −0.70** | −0.92 to −0.48 | 0.01 | ||
Digit Span, forward | Farmworkers | 3, 4, 8, 9, 12, 16–18, 20 | 1087 | −0.45** | −0.58 to −0.31 | 0.01 | 0.6 |
Applicators | 1, 2, 5, 10, 19 | 460 | −0.39** | −0.58 to −0.20 | 0.01 | ||
Finger Tapping, non-preferred hand | Farmworkers | 8, 12, 13, 16–18, 20 | 866 | −0.17* | −0.33 to −0.02 | 0.01 | 0.7 |
Applicators | 6, 7, 14 | 188 | −0.11 | −0.40 to 0.19 | 0.34 | ||
Reaction Time, latency | Farmworkers | 3, 4, 8, 16–18, 20, 21 | 935 | −0.32** | −0.45 to −0.19 | 0.03 | 0.5 |
Applicators | 5, 10, 15 | 340 | −0.23* | −0.45 to −0.01 | 0.04 | ||
Digit Symbol | Farmworkers | 3, 4, 9, 11 | 660 | −0.53** | −0.69 to −0.38 | 0.16 | 0.002 |
Applicators | 5, 10, 19 | 360 | −0.14 | −0.34 to 0.06 | 0.52 | ||
Pursuit Aiming, correct dots | Farmworkers | 3, 4, 11 | 603 | −0.62** | −0.79 to −0.46 | 0.02 | 0.07 |
Applicators | 5 | 195 | −0.31* | ||||
Trail Making A, latency | Farmworkers | 4, 9 | 202 | −0.75** | −1.05 to −0.45 | 0.23 | 0.03 |
Applicators | 1, 2, 5, 10, 19 | 460 | −0.36** | −0.55 to −0.17 | 0.001 | ||
Trail Making B, latency | Farmworkers | 4, 9, 13 | 234 | −0.67** | −0.95 to −0.40 | 0.87 | 0.2 |
Applicators | 1, 2, 5, 10, 19 | 460 | −0.46** | −0.66 to −0.27 | 0.002 | ||
Block Design, scaled score | Farmworkers | 4, 9 | 202 | −0.54** | −0.84 to −0.25 | 0.24 | 0.4 |
Applicators | 1, 2, 5, 19 | 361 | −0.70** | −0.92 to −0.48 | 0.005 |
*p<0.05; **p<0.001.
↵† Heterogeneous effect sizes are effect sizes with p<0.05 (last column, table 3), which means that there is a great variation in the individual effects sizes share in calculating the mean effect sizes of table 3. Here in table 4 the significant heterogeneous effect sizes are discussed.
↵‡ Homogeneity by group is testing the homogeneity of the mean effect size for the two groups farmworkers and applicators.
↵§ Homogeneity between group is testing if there is a significant difference between the effect sizes of applicators and farmworkers or not.