Differential patterns of reproductive and lifestyle risk factors for breast cancer according to birth cohorts among women in China, Japan and Korea
© 2024. The Author(s)..
BACKGROUND: The birth cohort effect has been suggested to influence the rate of breast cancer incidence and the trends of associated reproductive and lifestyle factors. We conducted a cohort study to determine whether a differential pattern of associations exists between certain factors and breast cancer risk based on birth cohorts.
METHODS: This was a cohort study using pooled data from 12 cohort studies. We analysed associations between reproductive (menarche age, menopause age, parity and age at first delivery) and lifestyle (smoking and alcohol consumption) factors and breast cancer risk. We obtained hazard ratios (HRs) with 95% confidence intervals (CIs) using the Cox proportional hazard regression analysis on the 1920s, 1930s, 1940s and 1950s birth cohorts.
RESULTS: Parity was found to lower the risk of breast cancer in the older but not in the younger birth cohort, whereas lifestyle factors showed associations with breast cancer risk only among the participants born in the 1950s. In the younger birth cohort group, the effect size was lower for parous women compared to the other cohort groups (HR [95% CI] 0.86 [0.66-1.13] compared to 0.60 [0.49-0.73], 0.46 [0.38-0.56] and 0.62 [0.51-0.77]). Meanwhile, a higher effect size was found for smoking (1.45 [1.14-1.84] compared to 1.25 [0.99-1.58], 1.06 [0.85-1.32] and 0.86 [0.69-1.08]) and alcohol consumption (1.22 [1.01-1.48] compared to 1.10 [0.90-1.33], 1.15 [0.96-1.38], and 1.07 [0.91-1.26]).
CONCLUSION: We observed different associations of parity, smoking and alcohol consumption with breast cancer risk across various birth cohorts.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:26 |
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| Enthalten in: |
Breast cancer research : BCR - 26(2024), 1 vom: 22. Jan., Seite 15 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Nabila, Salma [VerfasserIn] |
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| Links: |
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| Themen: |
Asia |
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| Anmerkungen: |
Date Completed 24.01.2024 Date Revised 08.03.2024 published: Electronic Citation Status MEDLINE |
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| doi: |
10.1186/s13058-024-01766-0 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM367446685 |
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| 100 | 1 | |a Nabila, Salma |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Differential patterns of reproductive and lifestyle risk factors for breast cancer according to birth cohorts among women in China, Japan and Korea |
| 264 | 1 | |c 2024 | |
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| 500 | |a Date Completed 24.01.2024 | ||
| 500 | |a Date Revised 08.03.2024 | ||
| 500 | |a published: Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a © 2024. The Author(s). | ||
| 520 | |a BACKGROUND: The birth cohort effect has been suggested to influence the rate of breast cancer incidence and the trends of associated reproductive and lifestyle factors. We conducted a cohort study to determine whether a differential pattern of associations exists between certain factors and breast cancer risk based on birth cohorts | ||
| 520 | |a METHODS: This was a cohort study using pooled data from 12 cohort studies. We analysed associations between reproductive (menarche age, menopause age, parity and age at first delivery) and lifestyle (smoking and alcohol consumption) factors and breast cancer risk. We obtained hazard ratios (HRs) with 95% confidence intervals (CIs) using the Cox proportional hazard regression analysis on the 1920s, 1930s, 1940s and 1950s birth cohorts | ||
| 520 | |a RESULTS: Parity was found to lower the risk of breast cancer in the older but not in the younger birth cohort, whereas lifestyle factors showed associations with breast cancer risk only among the participants born in the 1950s. In the younger birth cohort group, the effect size was lower for parous women compared to the other cohort groups (HR [95% CI] 0.86 [0.66-1.13] compared to 0.60 [0.49-0.73], 0.46 [0.38-0.56] and 0.62 [0.51-0.77]). Meanwhile, a higher effect size was found for smoking (1.45 [1.14-1.84] compared to 1.25 [0.99-1.58], 1.06 [0.85-1.32] and 0.86 [0.69-1.08]) and alcohol consumption (1.22 [1.01-1.48] compared to 1.10 [0.90-1.33], 1.15 [0.96-1.38], and 1.07 [0.91-1.26]) | ||
| 520 | |a CONCLUSION: We observed different associations of parity, smoking and alcohol consumption with breast cancer risk across various birth cohorts | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Research Support, N.I.H., Extramural | |
| 650 | 4 | |a Asia | |
| 650 | 4 | |a Background | |
| 650 | 4 | |a Birth cohort | |
| 650 | 4 | |a Breast cancer | |
| 650 | 4 | |a Lifestyle factors | |
| 650 | 4 | |a Reproductive factors | |
| 650 | 4 | |a Women | |
| 700 | 1 | |a Choi, Ji-Yeob |e verfasserin |4 aut | |
| 700 | 1 | |a Abe, Sarah Krull |e verfasserin |4 aut | |
| 700 | 1 | |a Islam, Md Rashedul |e verfasserin |4 aut | |
| 700 | 1 | |a Rahman, Md Shafiur |e verfasserin |4 aut | |
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| 700 | 1 | |a Sawada, Norie |e verfasserin |4 aut | |
| 700 | 1 | |a Tamakoshi, Akiko |e verfasserin |4 aut | |
| 700 | 1 | |a Sakata, Ritsu |e verfasserin |4 aut | |
| 700 | 1 | |a Hozawa, Atsushi |e verfasserin |4 aut | |
| 700 | 1 | |a Kim, Jeongseon |e verfasserin |4 aut | |
| 700 | 1 | |a Nagata, Chisato |e verfasserin |4 aut | |
| 700 | 1 | |a Park, Sue K |e verfasserin |4 aut | |
| 700 | 1 | |a Kweon, Sun-Seog |e verfasserin |4 aut | |
| 700 | 1 | |a Cai, Hui |e verfasserin |4 aut | |
| 700 | 1 | |a Tsugane, Shoichiro |e verfasserin |4 aut | |
| 700 | 1 | |a Kimura, Takashi |e verfasserin |4 aut | |
| 700 | 1 | |a Kanemura, Seiki |e verfasserin |4 aut | |
| 700 | 1 | |a Sugawara, Yumi |e verfasserin |4 aut | |
| 700 | 1 | |a Wada, Keiko |e verfasserin |4 aut | |
| 700 | 1 | |a Shin, Min-Ho |e verfasserin |4 aut | |
| 700 | 1 | |a Ahsan, Habibul |e verfasserin |4 aut | |
| 700 | 1 | |a Boffetta, Paolo |e verfasserin |4 aut | |
| 700 | 1 | |a Chia, Kee Seng |e verfasserin |4 aut | |
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| 700 | 1 | |a Kang, Daehee |e verfasserin |4 aut | |
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