Parents' ages at birth and risk of adult-onset hematologic malignancies among female teachers in California.
Although advanced parental age at one's birth has been associated with increased risk of breast and prostate cancers, few studies have examined its effect on adult-onset sporadic hematologic malignancies. The authors examined the association of parents' ages at women's births with risk of hematologic malignancies among 110,999 eligible women aged 22-84 years recruited into the prospective California Teachers Study. Between 1995 and 2007, 819 women without a family history of hematologic malignancies were diagnosed with incident lymphoma, leukemia (primarily acute myeloid leukemia), or multiple myeloma. Multivariable-adjusted Cox proportional hazards models provided estimates of relative risks and 95% confidence intervals. Paternal age was positively associated with non-Hodgkin lymphoma after adjustment for race and birth order (relative risk for age > or =40 vs. <25 years = 1.51, 95% confidence interval: 1.08, 2.13; P-trend = 0.01). Further adjustment for maternal age did not materially alter the association. By contrast, the elevated non-Hodgkin lymphoma risk associated with advanced maternal age (> or =40 years) became null when paternal age was included in the statistical model. No association was observed for acute myeloid leukemia or multiple myeloma. Advanced paternal age may play a role in non-Hodgkin lymphoma etiology. Potential etiologic mechanisms include de novo gene mutations, aberrant paternal gene imprinting, or telomere/telomerase biology.
Division of Cancer Etiology, Department of Population Sciences, Beckman Research Institute, City of Hope, 1500 East Duarte Road, Duarte, CA 91010, USA. yalu@coh.org
Yani
Y
Lu
Huiyan
H
Ma
Jane
J
Sullivan-Halley
Katherine D
KD
Henderson
Ellen T
ET
Chang
Christina A
CA
Clarke
Susan L
SL
Neuhausen
Dee W
DW
West
Leslie
L
Bernstein
Sophia S
SS
Wang
D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001722:Birth Order; D002140:California / Q000453:epidemiology; D016001:Confidence Intervals; D005178:Faculty / Q000706:statistics & numerical data*; D005260:Female; D019337:Hematologic Neoplasms / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D007938:Leukemia / Q000453:epidemiology / Q000209:etiology; D008223:Lymphoma / Q000453:epidemiology / Q000209:etiology; D008228:Lymphoma, Non-Hodgkin / Q000453:epidemiology / Q000209:etiology; D008297:Male; D008875:Middle Aged; D009101:Multiple Myeloma / Q000453:epidemiology / Q000209:etiology; D010290:Parents; D016016:Proportional Hazards Models; D012306:Risk; D012307:Risk Factors; D055815:Young Adult