| Overall | SPK I | SPK II | SPK III |
| Mean (St. Dev.) | 0.98 (1.95) | 0.97 (1.19) | 0.87 (0.81) | Median | 0.37 | 0.82 | 0.92 | N | 21 | 23 | 26 | 95% confidence interval (lower, upper) | (0.09, 1.86) | (0.43, 1.51) | (0.51, 1.24) | Minâmax | (0, 9.13) | (0, 5.5) | (0, 3.65) |
| Summer season | | | |
| Mean (St. Dev.) | 0.55 (0.58) | 0.8 (1.0) | 0.73 (0.68) | Median | 0.34 | 0.27 | 0.52 | N | 10 | 11 | 13 | 95% confidence interval (lower, upper) | (0.19, 0.91) | (0.24, 1.37) | (0.37, 1.09) | Minâmax | (0, 1.89) | (0, 3.36) | (0, 2.5) |
| Fall season | | | |
| Mean (St. Dev.) | 1.3 (2.53) | 1.32 (1.42) | 1.13 (0.9) | Median | 0.42 | 0.97 | 0.94 | N | 11 | 12 | 13 | 95% confidence interval (lower, upper) | (0, 2.67) | (0.55, 2.09) | (0.66, 1.6) | Minâmax | (0.05, 9.13) | (0.2, 5.5) | (0.23, 3.65) |
| Urban/suburban children | | | |
| Mean (St. Dev.) | 0.48 (0.52) | 0.67 (0.64) | 0.63 (0.55)1 | Median | 0.35 | 0.48 | 0.45 | N | 11 | 12 | 12 | 95% confidence interval (lower, upper) | (0.19, 0.77) | (0.31, 1.03) | (0.32, 0.94) | Minâmax | (0.04, 1.88) | (0.02, 2.27) | (0.01, 1.97) |
| Agricultural children | | | |
| Mean (St. Dev.) | 1.53 (2.73) | 1.51 (1.58) | 1.19 (0.92)1 | Median | 0.88 | 1.06 | 1.04 | N | 10 | 11 | 14 | 95% confidence interval (lower, upper) | (0.1, 2.96) | (0.91, 2.11) | (0.68, 1.7) | Minâmax | (0, 9.12) | (0, 5.5) | (0, 3.65) |
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