Maternal use of hormonal contraception and risk of childhood leukemia: A Scandinavian population-based cohort study

Maternal hormonal contraception use has been associated with childhood leukemia risk. However, studies are few and often based on self-reported information. Using registry data from Denmark, Norway, and Sweden, we identified 3,183,316 children (born 1996–2018) and followed them from birth until leuk...

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Veröffentlicht in:European journal of cancer (1990) 2025-01, Vol.215, p.115168, Article 115168
Hauptverfasser: Hemmingsen, Caroline H., Kjaer, Susanne K., Hjorth, Sarah, Nörby, Ulrika, Broe, Anne, Pottegård, Anton, Bénévent, Justine, Schmiegelow, Kjeld, Skovlund, Charlotte Wessel, Leinonen, Maarit K., Nordeng, Hedvig, Mørch, Lina S., Hargreave, Marie
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container_title European journal of cancer (1990)
container_volume 215
creator Hemmingsen, Caroline H.
Kjaer, Susanne K.
Hjorth, Sarah
Nörby, Ulrika
Broe, Anne
Pottegård, Anton
Bénévent, Justine
Schmiegelow, Kjeld
Skovlund, Charlotte Wessel
Leinonen, Maarit K.
Nordeng, Hedvig
Mørch, Lina S.
Hargreave, Marie
description Maternal hormonal contraception use has been associated with childhood leukemia risk. However, studies are few and often based on self-reported information. Using registry data from Denmark, Norway, and Sweden, we identified 3,183,316 children (born 1996–2018) and followed them from birth until leukemia diagnosis, censoring (death, emigration, other cancer, 20th birthday) or study closure (December 31st, 2017, 2018 or 2020). We estimated hazard ratios (HRs) and 95 % confidence intervals (CIs) for childhood leukemia (any, lymphoid and non-lymphoid) associated with maternal recent use (≤ 3 months before or during pregnancy) or previous use (before recent use) of hormonal contraception overall and by type, compared to no use. During 29,455,528 person-years, 1701 children developed leukemia (no use: 518, previous use: 974, recent use: 209). Maternal recent use of hormonal contraception was associated with an increased leukemia risk in children (HR 1.22, 95 % CI 1.04–1.44; incidence rate per 1,000,000 person-years [IR] 65), compared to no use (IR 53). The association was strongest for non-lymphoid leukemia (HR 1.69, 95 % CI 1.20–2.37) and mainly driven by the oral combined products, both for any leukemia (HR 1.29, 95 % CI 1.05–1.59) and non-lymphoid leukemia (HR 1.75, 95 % CI 1.17–2.62). Additionally, non-lymphoid leukemia was associated with recent use of the non-oral progestin-only products (HR 2.10, 95 % CI 1.28–3.44). Although the absolute risk was low, maternal hormonal contraception use up to or during pregnancy was associated with an increased childhood leukemia risk, particularly non-lymphoid leukemia, and mainly driven by oral combined and non-oral progestin-only products. •Maternal hormonal contraception linked to higher childhood leukemia risk.•Association strongest when used close to or during pregnancy.•Risk increase mainly observed for non-lymphoid leukemia.•Primarily associated with oral combined and non-oral progestin-only contraceptives.
doi_str_mv 10.1016/j.ejca.2024.115168
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However, studies are few and often based on self-reported information. Using registry data from Denmark, Norway, and Sweden, we identified 3,183,316 children (born 1996–2018) and followed them from birth until leukemia diagnosis, censoring (death, emigration, other cancer, 20th birthday) or study closure (December 31st, 2017, 2018 or 2020). We estimated hazard ratios (HRs) and 95 % confidence intervals (CIs) for childhood leukemia (any, lymphoid and non-lymphoid) associated with maternal recent use (≤ 3 months before or during pregnancy) or previous use (before recent use) of hormonal contraception overall and by type, compared to no use. During 29,455,528 person-years, 1701 children developed leukemia (no use: 518, previous use: 974, recent use: 209). Maternal recent use of hormonal contraception was associated with an increased leukemia risk in children (HR 1.22, 95 % CI 1.04–1.44; incidence rate per 1,000,000 person-years [IR] 65), compared to no use (IR 53). The association was strongest for non-lymphoid leukemia (HR 1.69, 95 % CI 1.20–2.37) and mainly driven by the oral combined products, both for any leukemia (HR 1.29, 95 % CI 1.05–1.59) and non-lymphoid leukemia (HR 1.75, 95 % CI 1.17–2.62). Additionally, non-lymphoid leukemia was associated with recent use of the non-oral progestin-only products (HR 2.10, 95 % CI 1.28–3.44). Although the absolute risk was low, maternal hormonal contraception use up to or during pregnancy was associated with an increased childhood leukemia risk, particularly non-lymphoid leukemia, and mainly driven by oral combined and non-oral progestin-only products. •Maternal hormonal contraception linked to higher childhood leukemia risk.•Association strongest when used close to or during pregnancy.•Risk increase mainly observed for non-lymphoid leukemia.•Primarily associated with oral combined and non-oral progestin-only contraceptives.</description><identifier>ISSN: 0959-8049</identifier><identifier>ISSN: 1879-0852</identifier><identifier>EISSN: 1879-0852</identifier><identifier>DOI: 10.1016/j.ejca.2024.115168</identifier><identifier>PMID: 39667251</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Adolescent ; Adult ; Child ; Child, Preschool ; Childhood cancer ; Cohort Studies ; Cohort study ; Contraceptives, Oral, Hormonal - adverse effects ; Denmark - epidemiology ; Female ; Hormonal contraception ; Hormonal Contraception - adverse effects ; Humans ; Incidence ; Infant ; Infant, Newborn ; Leukemia ; Leukemia - chemically induced ; Leukemia - epidemiology ; Male ; Norway - epidemiology ; Pharmacoepidemiology ; Pregnancy ; Prenatal Exposure Delayed Effects - chemically induced ; Prenatal Exposure Delayed Effects - epidemiology ; Registries ; Risk Factors ; Scandinavia ; Scandinavian and Nordic Countries - epidemiology ; Sweden - epidemiology ; Young Adult</subject><ispartof>European journal of cancer (1990), 2025-01, Vol.215, p.115168, Article 115168</ispartof><rights>2024 Elsevier Ltd</rights><rights>Copyright © 2024 Elsevier Ltd. 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However, studies are few and often based on self-reported information. Using registry data from Denmark, Norway, and Sweden, we identified 3,183,316 children (born 1996–2018) and followed them from birth until leukemia diagnosis, censoring (death, emigration, other cancer, 20th birthday) or study closure (December 31st, 2017, 2018 or 2020). We estimated hazard ratios (HRs) and 95 % confidence intervals (CIs) for childhood leukemia (any, lymphoid and non-lymphoid) associated with maternal recent use (≤ 3 months before or during pregnancy) or previous use (before recent use) of hormonal contraception overall and by type, compared to no use. During 29,455,528 person-years, 1701 children developed leukemia (no use: 518, previous use: 974, recent use: 209). Maternal recent use of hormonal contraception was associated with an increased leukemia risk in children (HR 1.22, 95 % CI 1.04–1.44; incidence rate per 1,000,000 person-years [IR] 65), compared to no use (IR 53). The association was strongest for non-lymphoid leukemia (HR 1.69, 95 % CI 1.20–2.37) and mainly driven by the oral combined products, both for any leukemia (HR 1.29, 95 % CI 1.05–1.59) and non-lymphoid leukemia (HR 1.75, 95 % CI 1.17–2.62). Additionally, non-lymphoid leukemia was associated with recent use of the non-oral progestin-only products (HR 2.10, 95 % CI 1.28–3.44). Although the absolute risk was low, maternal hormonal contraception use up to or during pregnancy was associated with an increased childhood leukemia risk, particularly non-lymphoid leukemia, and mainly driven by oral combined and non-oral progestin-only products. •Maternal hormonal contraception linked to higher childhood leukemia risk.•Association strongest when used close to or during pregnancy.•Risk increase mainly observed for non-lymphoid leukemia.•Primarily associated with oral combined and non-oral progestin-only contraceptives.</description><subject>Adolescent</subject><subject>Adult</subject><subject>Child</subject><subject>Child, Preschool</subject><subject>Childhood cancer</subject><subject>Cohort Studies</subject><subject>Cohort study</subject><subject>Contraceptives, Oral, Hormonal - adverse effects</subject><subject>Denmark - epidemiology</subject><subject>Female</subject><subject>Hormonal contraception</subject><subject>Hormonal Contraception - adverse effects</subject><subject>Humans</subject><subject>Incidence</subject><subject>Infant</subject><subject>Infant, Newborn</subject><subject>Leukemia</subject><subject>Leukemia - chemically induced</subject><subject>Leukemia - epidemiology</subject><subject>Male</subject><subject>Norway - epidemiology</subject><subject>Pharmacoepidemiology</subject><subject>Pregnancy</subject><subject>Prenatal Exposure Delayed Effects - chemically induced</subject><subject>Prenatal Exposure Delayed Effects - epidemiology</subject><subject>Registries</subject><subject>Risk Factors</subject><subject>Scandinavia</subject><subject>Scandinavian and Nordic Countries - epidemiology</subject><subject>Sweden - epidemiology</subject><subject>Young Adult</subject><issn>0959-8049</issn><issn>1879-0852</issn><issn>1879-0852</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2025</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kMFu1DAQhi0EokvbF-CAfOSSxXZiJ0ZcqooWpCIOwNmajidab5M42Emlvj2OtnDkMLJG_v5Pmp-xt1LspZDmw3FPR4S9EqrZS6ml6V6wnexaW4lOq5dsJ6y2VScae8be5HwUQrRdI16zs9oa0yotdyx_g4XSBANfM_HY80NMY9x2jNOSAGleQpw4TJ6nkB82BA9h8IcYPR9ofaAxwEd-xX9gYcIEjwEmPsd5HWBLVveQyRdbES88L6t_umCvehgyXT6_5-zXzeef11-qu--3X6-v7ipUdbtUVhvdW9N6oh5sjRp6i9AopdDqMttfg8bX2GJhLHhLjRCd6jtPXU_1OXt_8s4p_l4pL24MGWkYYKK4ZlfLxhhTN7otqDqhmGLOiXo3pzBCenJSuK1sd3Rb2W4r253KLqF3z_71fiT_L_K33QJ8OgFUrnwMlFzGQBOSD4lwcT6G__n_AAUKktA</recordid><startdate>20250117</startdate><enddate>20250117</enddate><creator>Hemmingsen, Caroline H.</creator><creator>Kjaer, Susanne K.</creator><creator>Hjorth, Sarah</creator><creator>Nörby, Ulrika</creator><creator>Broe, Anne</creator><creator>Pottegård, Anton</creator><creator>Bénévent, Justine</creator><creator>Schmiegelow, Kjeld</creator><creator>Skovlund, Charlotte Wessel</creator><creator>Leinonen, Maarit K.</creator><creator>Nordeng, Hedvig</creator><creator>Mørch, Lina S.</creator><creator>Hargreave, Marie</creator><general>Elsevier Ltd</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20250117</creationdate><title>Maternal use of hormonal contraception and risk of childhood leukemia: A Scandinavian population-based cohort study</title><author>Hemmingsen, Caroline H. ; 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However, studies are few and often based on self-reported information. Using registry data from Denmark, Norway, and Sweden, we identified 3,183,316 children (born 1996–2018) and followed them from birth until leukemia diagnosis, censoring (death, emigration, other cancer, 20th birthday) or study closure (December 31st, 2017, 2018 or 2020). We estimated hazard ratios (HRs) and 95 % confidence intervals (CIs) for childhood leukemia (any, lymphoid and non-lymphoid) associated with maternal recent use (≤ 3 months before or during pregnancy) or previous use (before recent use) of hormonal contraception overall and by type, compared to no use. During 29,455,528 person-years, 1701 children developed leukemia (no use: 518, previous use: 974, recent use: 209). Maternal recent use of hormonal contraception was associated with an increased leukemia risk in children (HR 1.22, 95 % CI 1.04–1.44; incidence rate per 1,000,000 person-years [IR] 65), compared to no use (IR 53). The association was strongest for non-lymphoid leukemia (HR 1.69, 95 % CI 1.20–2.37) and mainly driven by the oral combined products, both for any leukemia (HR 1.29, 95 % CI 1.05–1.59) and non-lymphoid leukemia (HR 1.75, 95 % CI 1.17–2.62). Additionally, non-lymphoid leukemia was associated with recent use of the non-oral progestin-only products (HR 2.10, 95 % CI 1.28–3.44). Although the absolute risk was low, maternal hormonal contraception use up to or during pregnancy was associated with an increased childhood leukemia risk, particularly non-lymphoid leukemia, and mainly driven by oral combined and non-oral progestin-only products. •Maternal hormonal contraception linked to higher childhood leukemia risk.•Association strongest when used close to or during pregnancy.•Risk increase mainly observed for non-lymphoid leukemia.•Primarily associated with oral combined and non-oral progestin-only contraceptives.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>39667251</pmid><doi>10.1016/j.ejca.2024.115168</doi></addata></record>
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identifier ISSN: 0959-8049
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source MEDLINE; Elsevier ScienceDirect Journals
subjects Adolescent
Adult
Child
Child, Preschool
Childhood cancer
Cohort Studies
Cohort study
Contraceptives, Oral, Hormonal - adverse effects
Denmark - epidemiology
Female
Hormonal contraception
Hormonal Contraception - adverse effects
Humans
Incidence
Infant
Infant, Newborn
Leukemia
Leukemia - chemically induced
Leukemia - epidemiology
Male
Norway - epidemiology
Pharmacoepidemiology
Pregnancy
Prenatal Exposure Delayed Effects - chemically induced
Prenatal Exposure Delayed Effects - epidemiology
Registries
Risk Factors
Scandinavia
Scandinavian and Nordic Countries - epidemiology
Sweden - epidemiology
Young Adult
title Maternal use of hormonal contraception and risk of childhood leukemia: A Scandinavian population-based cohort study
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