Table 3.
Odds ratios for associations of residential mobility with selected characteristics in childhood leukemia cases in the California Power Lines Study, 1986–2008 – Case-Only.
| Characteristic | Moved vs. Not Moved (reference) |
Moved Within Neighborhood vs. Not Moved (reference) | Moved Outside Neighborhood vs. Not Moved (reference) | |
|---|---|---|---|---|
| Crude OR (95% CI) | Adjusteda OR (95% CI) | AORa (95% CI) | AORa (95% CI) | |
| Age (years) | ||||
| < 1 | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| 1–5 | 3.78 (2.92–4.90) | 3.84 (2.90–5.09) | 2.76 (1.78–4.27) | 4.39 (3.18–6.06) |
| 6–9 | 8.79 (6.54–11.81) | 8.26 (6.03–11.33) | 6.04 (3.75–9.72) | 9.37 (6.57–13.37) |
| 10–15 | 16.05 (11.46–22.47) | 14.98 (10.51–21.35) | 8.11 (4.83–13.62) | 18.40 (12.47–27.17) |
| Race/Ethnicity | ||||
| White | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| Black | 2.25 (1.66–3.04) | 1.69 (1.22–2.35) | 1.41 (0.83–2.40) | 1.75 (1.25–2.45) |
| Asian | 0.95 (0.78–1.16) | 0.92 (0.72–1.16) | 0.92 (0.63–1.36) | 0.94 (0.73–1.20) |
| Other | 1.17 (0.75–1.81) | 0.97 (0.60–1.57) | 1.59 (0.81–3.12) | 0.84 (0.50–1.40) |
| Hispanic | 1.44 (1.26–1.64) | 1.13 (0.95–1.33) | 1.54 (1.18–2.02) | 1.03 (0.86–1.23) |
| Leukemia Type | ||||
| ALL | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| AML | 0.84 (0.72–0.99) | 0.93 (0.77–1.12) | 0.90 (0.68–1.19) | 0.94 (0.77–1.15) |
| Other | 0.64 (0.48–0.87) | 0.79 (0.57–1.11) | 0.74 (0.44–1.26) | 0.81 (0.57–1.16) |
| Maternal Age (years) | ||||
| < 25 | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| 25–34 | 0.55 (0.48–0.63) | 0.59 (0.50–0.69) | 0.59 (0.47–0.74) | 0.59 (0.50–0.69) |
| > =35 | 0.30 (0.25–0.36) | 0.34 (0.27–0.42) | 0.44 (0.32–0.61) | 0.31 (0.24–0.39) |
| Siblings | ||||
| 0 | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| 1 | 0.77 (0.67–0.89) | 0.86 (0.74–1.00) | 0.92 (0.73–1.16) | 0.84 (0.72–0.99) |
| 2 | 0.76 (0.64–0.89) | 0.95 (0.79–1.15) | 1.12 (0.85–1.48) | 0.90 (0.74–1.10) |
| 3 | 0.66 (0.52–0.82) | 0.85 (0.66–1.10) | 0.80 (0.54–1.19) | 0.87 (0.66–1.14) |
| 4+ | 0.92 (0.71–1.20) | 1.30 (0.96–1.77) | 1.40 (0.91–2.14) | 1.26 (0.91–1.75) |
| Maternal Place of Birth | ||||
| US | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| Non-US | 1.12 (1.00–1.26) | 1.13 (0.97–1.32) | 1.58 (1.27–1.98) | 1.01 (0.86–1.19) |
| SES | ||||
| Low | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| High | 0.63 (0.56–0.72) | 0.85 (0.74–0.98) | 0.75 (0.60–0.94) | 0.88 (0.76–1.03) |
| Calculated Field (μT) | ||||
| < 0.1 | 1.00 (reference) | 1.00 (reference)b | NA | NA |
| 0.1- < 0.4 | 1.77 (0.86–3.67) | 1.81 (0.83–3.93)b | NA | NA |
| ≥0.4 | 0.94 (0.36–2.47) | 1.07 (0.39–2.93)b | NA | NA |
| Distance to Closest 200 + kV Power Line (m) | ||||
| ≥600 | 1.00 (reference) | 1.00 (reference)b | NA | NA |
| 500- < 600 | 0.90 (0.55–1.49) | 0.74 (0.43–1.26)b | NA | NA |
| 400- < 500 | 1.36 (0.76–2.43) | 1.31 (0.71–2.40)b | NA | NA |
| 300- < 400 | 1.00 (0.61–1.63) | 0.79 (0.47–1.33)b | NA | NA |
| 200- < 300 | 0.88 (0.52–1.50) | 0.85 (0.48–1.51)b | NA | NA |
| 100- < 200 | 1.21 (0.68–2.15) | 1.22 (0.66–2.28)b | NA | NA |
| 50- < 100 | 2.90 (1.10–7.66) | 2.23 (0.82–6.06)b | NA | NA |
| < 50 | 0.79 (0.34–1.83) | 0.97 (0.40–2.33)b | NA | NA |
a
Adjusted for all other non-exposure-of-interest covariates in model.
b
Adjusted for age of child, leukemia type, maternal age at birth, race/ethnicity, number of siblings, mother’s place of birth and SES. Numbers too small to analyze with regards to neighborhood.