Parity, Age at First Birth, and Risk of Death from Bladder Cancer: A Population-Based Cohort Study in Taiwan
Abstract
:1. Introduction
2. Materials and Methods
2.1. Data Source
2.2. Study Population
2.3. Follow-Up
2.4. Statistics
3. Results
4. Discussion
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Variables | No. of Subjects | Follow-Up Person-Years | No. of Deaths from Bladder Cancer | Mortality Rate (per 100,000 Person-Years) |
---|---|---|---|---|
Age at recruitment (first birth) | ||||
≤23 | 551,759 | 15,312,470.08 | 21 | 0.14 |
>23~≤26 | 433,114 | 11,592,980.92 | 19 | 0.16 |
>26 | 307,589 | 8,074,795.00 | 23 | 0.28 |
Parity (children) | ||||
1 | 157,207 | 4,170,772.33 | 7 | 0.17 |
2 | 564,727 | 15,124,112.33 | 28 | 0.19 |
3+ | 570,528 | 15,685,361.33 | 28 | 0.18 |
Marital status | ||||
Married | 1,260,615 | 34,115,479.25 | 63 | 0.18 |
Not married | 31,847 | 864,766.75 | 0 | 0.00 |
Years of schooling | ||||
≤9 years | 722,518 | 19,850,938.17 | 31 | 0.16 |
>9 years | 569,944 | 15,129,307.83 | 32 | 0.21 |
Birth place | ||||
Hospital/clinic | 1,245,925 | 33,638,862.83 | 60 | 0.18 |
Home/other | 46,537 | 1,341,383.17 | 3 | 0.22 |
Variables | Crude RR (95% CI) | Multivariate-Adjusted RR * (95% CI) |
---|---|---|
Age at recruitment (first birth) | ||
≤23 | 1.00 | 1.00 |
>23–26 | 1.29 (0.69–2.40) | 1.24 (0.66–2.35) |
>26 | 2.33 (1.29–4.22) | 2.30 (1.21–4.39) |
p = 0.01 for linear trend | p = 0.01 for linear trend | |
Parity (children) | ||
1 | 1.00 | 1.00 |
2 | 1.10 (0.48–2.51) | 1.17 (0.51–2.69) |
3+ | 1.01 (0.44–2.31) | 1.31 (0.56–3.10) |
p = 0.89 for linear trend | p = 0.58 for linear trend | |
Marital status | ||
Married | 1.00 | 1.00 |
Not married | – | – |
Years of schooling | ||
≤9 years | 1.00 | 1.00 |
>9 years | 1.46 (0.89–2.40) | 1.25 (0.73–2.13) |
Birth place | ||
Hospital/clinic | 1.00 | 1.00 |
Home/other | 1.11 (0.35–3.55) | 1.35 (0.42–4.40) |
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Chiu, H.-F.; Chen, B.K.; Yang, C.-Y. Parity, Age at First Birth, and Risk of Death from Bladder Cancer: A Population-Based Cohort Study in Taiwan. Int. J. Environ. Res. Public Health 2016, 13, 1197. https://doi.org/10.3390/ijerph13121197
Chiu H-F, Chen BK, Yang C-Y. Parity, Age at First Birth, and Risk of Death from Bladder Cancer: A Population-Based Cohort Study in Taiwan. International Journal of Environmental Research and Public Health. 2016; 13(12):1197. https://doi.org/10.3390/ijerph13121197
Chicago/Turabian StyleChiu, Hui-Fen, Brian K. Chen, and Chun-Yuh Yang. 2016. "Parity, Age at First Birth, and Risk of Death from Bladder Cancer: A Population-Based Cohort Study in Taiwan" International Journal of Environmental Research and Public Health 13, no. 12: 1197. https://doi.org/10.3390/ijerph13121197