Socio-occupational class, region of birth and maternal age: influence on time to detection of cryptorchidism (undescended testes): a Danish nationwide register study

Research output: Contribution to journalJournal articleResearchpeer-review

Standard

Socio-occupational class, region of birth and maternal age : influence on time to detection of cryptorchidism (undescended testes): a Danish nationwide register study. / Hougaard, Karin Sørig; Larsen, Ann Dyreborg; Hannerz, Harald; Andersen, Anne-Marie Nybo; Jørgensen, Kristian Tore; Toft, Gunnar Vase; Bonde, Jens Peter; Jensen, Morten Søndergaard.

In: B M C Urology, Vol. 14, 23, 2014, p. 1-7.

Research output: Contribution to journalJournal articleResearchpeer-review

Harvard

Hougaard, KS, Larsen, AD, Hannerz, H, Andersen, A-MN, Jørgensen, KT, Toft, GV, Bonde, JP & Jensen, MS 2014, 'Socio-occupational class, region of birth and maternal age: influence on time to detection of cryptorchidism (undescended testes): a Danish nationwide register study', B M C Urology, vol. 14, 23, pp. 1-7. https://doi.org/10.1186/1471-2490-14-23

APA

Hougaard, K. S., Larsen, A. D., Hannerz, H., Andersen, A-M. N., Jørgensen, K. T., Toft, G. V., Bonde, J. P., & Jensen, M. S. (2014). Socio-occupational class, region of birth and maternal age: influence on time to detection of cryptorchidism (undescended testes): a Danish nationwide register study. B M C Urology, 14, 1-7. [23]. https://doi.org/10.1186/1471-2490-14-23

Vancouver

Hougaard KS, Larsen AD, Hannerz H, Andersen A-MN, Jørgensen KT, Toft GV et al. Socio-occupational class, region of birth and maternal age: influence on time to detection of cryptorchidism (undescended testes): a Danish nationwide register study. B M C Urology. 2014;14:1-7. 23. https://doi.org/10.1186/1471-2490-14-23

Author

Hougaard, Karin Sørig ; Larsen, Ann Dyreborg ; Hannerz, Harald ; Andersen, Anne-Marie Nybo ; Jørgensen, Kristian Tore ; Toft, Gunnar Vase ; Bonde, Jens Peter ; Jensen, Morten Søndergaard. / Socio-occupational class, region of birth and maternal age : influence on time to detection of cryptorchidism (undescended testes): a Danish nationwide register study. In: B M C Urology. 2014 ; Vol. 14. pp. 1-7.

Bibtex

@article{6f4e3ca5d345461683034068774cbcd3,
title = "Socio-occupational class, region of birth and maternal age: influence on time to detection of cryptorchidism (undescended testes): a Danish nationwide register study",
abstract = "BACKGROUND: Cryptorchidism (undescended testes) is associated with poor male fertility, but can be alleviated and fertility preserved to some degree by early detection and treatment. Here we assess the influence of socio-occupational class, geographical region, maternal age and birth cohort on time to detection and correction of cryptorchidism.METHODS: All boys born in Denmark, 1981 to 1987 or 1988 to 1994, with a diagnosis of cryptorchidism were identified in nationwide registers. The boys were followed for a diagnosis until their 16th birthday. The age at first diagnosis was noted and used as proxy for time to detection of cryptorchidism. Parental employment in the calendar year preceding birth was grouped into one of five socio-occupational classes. Geographical region was defined by place of birth in one of 15 Danish counties. Detection rate ratios of cryptorchidism were analyzed as a function of parental socio-occupational group, county, maternal age and birth cohort by use of Poisson regression.RESULTS: Some 6,059 boys in the early and 5,947 boys in the late cohort received a diagnosis of cryptorchidism. Time to detection was independent of parental socio-occupational group and maternal age but differed slightly between geographical regions. A similar pattern was obtained for surgical correction after a diagnosis. Age at diagnosis decreased by 2.7 years from the early to the late cohort.CONCLUSIONS: These results indicate that childhood socio-occupational inequality in detection and correction of cryptorchidism would play a negligible role in male infertility in a life course perspective. Geographical region may have exerted some influence, especially for the oldest cohort.",
author = "Hougaard, {Karin S{\o}rig} and Larsen, {Ann Dyreborg} and Harald Hannerz and Andersen, {Anne-Marie Nybo} and J{\o}rgensen, {Kristian Tore} and Toft, {Gunnar Vase} and Bonde, {Jens Peter} and Jensen, {Morten S{\o}ndergaard}",
year = "2014",
doi = "10.1186/1471-2490-14-23",
language = "English",
volume = "14",
pages = "1--7",
journal = "B M C Urology",
issn = "1471-2490",
publisher = "BioMed Central Ltd.",

}

RIS

TY - JOUR

T1 - Socio-occupational class, region of birth and maternal age

T2 - influence on time to detection of cryptorchidism (undescended testes): a Danish nationwide register study

AU - Hougaard, Karin Sørig

AU - Larsen, Ann Dyreborg

AU - Hannerz, Harald

AU - Andersen, Anne-Marie Nybo

AU - Jørgensen, Kristian Tore

AU - Toft, Gunnar Vase

AU - Bonde, Jens Peter

AU - Jensen, Morten Søndergaard

PY - 2014

Y1 - 2014

N2 - BACKGROUND: Cryptorchidism (undescended testes) is associated with poor male fertility, but can be alleviated and fertility preserved to some degree by early detection and treatment. Here we assess the influence of socio-occupational class, geographical region, maternal age and birth cohort on time to detection and correction of cryptorchidism.METHODS: All boys born in Denmark, 1981 to 1987 or 1988 to 1994, with a diagnosis of cryptorchidism were identified in nationwide registers. The boys were followed for a diagnosis until their 16th birthday. The age at first diagnosis was noted and used as proxy for time to detection of cryptorchidism. Parental employment in the calendar year preceding birth was grouped into one of five socio-occupational classes. Geographical region was defined by place of birth in one of 15 Danish counties. Detection rate ratios of cryptorchidism were analyzed as a function of parental socio-occupational group, county, maternal age and birth cohort by use of Poisson regression.RESULTS: Some 6,059 boys in the early and 5,947 boys in the late cohort received a diagnosis of cryptorchidism. Time to detection was independent of parental socio-occupational group and maternal age but differed slightly between geographical regions. A similar pattern was obtained for surgical correction after a diagnosis. Age at diagnosis decreased by 2.7 years from the early to the late cohort.CONCLUSIONS: These results indicate that childhood socio-occupational inequality in detection and correction of cryptorchidism would play a negligible role in male infertility in a life course perspective. Geographical region may have exerted some influence, especially for the oldest cohort.

AB - BACKGROUND: Cryptorchidism (undescended testes) is associated with poor male fertility, but can be alleviated and fertility preserved to some degree by early detection and treatment. Here we assess the influence of socio-occupational class, geographical region, maternal age and birth cohort on time to detection and correction of cryptorchidism.METHODS: All boys born in Denmark, 1981 to 1987 or 1988 to 1994, with a diagnosis of cryptorchidism were identified in nationwide registers. The boys were followed for a diagnosis until their 16th birthday. The age at first diagnosis was noted and used as proxy for time to detection of cryptorchidism. Parental employment in the calendar year preceding birth was grouped into one of five socio-occupational classes. Geographical region was defined by place of birth in one of 15 Danish counties. Detection rate ratios of cryptorchidism were analyzed as a function of parental socio-occupational group, county, maternal age and birth cohort by use of Poisson regression.RESULTS: Some 6,059 boys in the early and 5,947 boys in the late cohort received a diagnosis of cryptorchidism. Time to detection was independent of parental socio-occupational group and maternal age but differed slightly between geographical regions. A similar pattern was obtained for surgical correction after a diagnosis. Age at diagnosis decreased by 2.7 years from the early to the late cohort.CONCLUSIONS: These results indicate that childhood socio-occupational inequality in detection and correction of cryptorchidism would play a negligible role in male infertility in a life course perspective. Geographical region may have exerted some influence, especially for the oldest cohort.

U2 - 10.1186/1471-2490-14-23

DO - 10.1186/1471-2490-14-23

M3 - Journal article

C2 - 24581337

VL - 14

SP - 1

EP - 7

JO - B M C Urology

JF - B M C Urology

SN - 1471-2490

M1 - 23

ER -

ID: 120532813