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. 2018 Apr 16;7(6):2665–2681. doi: 10.1002/cam4.1466

Figure 1.

Figure 1

Association between acute lymphoblastic leukemia and living on a farm (yes vs. no), (restricted to children aged ≥1 year), meta‐analysis of eight studies (1980–2013), Childhood Leukemia International Consortium. ALL, acute lymphoblastic leukemia; AUS_ALL, Australian Study of Causes of Acute Lymphoblastic Leukemia in Children; CA_QCLS, Quebec Childhood Leukemia Study (Canada); CI, confidence interval; FR_ADELE, Adele Study (France); FR_ESCALE, Epidemiological Study on Childhood Cancer and Leukemia (France); FR_ESTELLE, Epidemiologic Study on Childhood Cancer, Leukemia and lymphoma (France); GR_NARECHEM, Nationwide Registration for Childhood Hematological Malignancies (Greece); NZ_NZCCS, New Zealand Childhood Cancer Study (New Zealand); OR, odds ratio; Pe_ALL, prevalence of exposure among acute lymphoblastic leukemia cases; Pe_cont, prevalence of exposure among controls; US_NCCLS, Northern California Childhood Leukemia Study (US). Studies are ordered by increasing study period. Study‐specific odds ratios and 95% confidence interval were estimated by conditional (CA_QCLS, GR_NARECHEM, NZ_NZCCS, US_NCCLS) or unconditional (AUS_ALL, FR_ADELE, FR_ESCALE, FR_ESTELLE) logistic models, adjusted for child's age at reference date, sex, maternal educational level (AUS_ALL, GR_NARECHEM, NZ_NZCCS, US_NCCLS), ethnicity (FR_ADELE, NZ_NZCCS), region or center of recruitment (FR_ADELE), region or state of residence (AUS_ALL), “urban/rural” status of the place of residence (GR_NARECHEM, FR_ESTELLE), parental professional category (FR_ESCALE, FR_ESTELLE, GR_NARECHEM), household income (US_NCCLS), maternal age at child's birth (AUS_ALL, CA_QCLS, FR_ESCALE, FR_ESTELLE, US_NCCLS).