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Biomedical subjects

J Boldsen

Publications and source records attributed to J Boldsen.

5 recordsLinked to original sources
PubMed1992

[Cigarette smoking and time before pregnancy among Danish pharmacy assistants].

The relationship between time to pregnancy and cigarette smoking was studied in a group of 4,924 pharmacy assistants under 40. The information was collected by means of a self administered questionnaire and the response rate was 92%. The data were analysed by a recently developed statistical model for description of time to pregnancy, which provides a more revealing test than the classic contingency table analysis. The study shows that smokers have a median time to pregnancy which is 27% longer than for non smokers. This may partly be due to lifestyle associated with smoking (e.g. alcohol and caffeine intake). Lifestyles such as these have been reported to prolong time to pregnancy. It is shown that time to pregnancy is an easily obtained measurement of fecundity. Only 3.6% of the women were unable to remember their time to pregnancy. The conclusion of the study was that information pertaining to the relationship between fertility and smoking habits/lifestyle should be a part of the instruction for women who wish to become pregnant.

Adult↗
PubMed1989

Age of partners at first intercourse among Danish males and females.

In 1984-1985 a representative sample of 286 Danish women (response rate = 75.3%) and 336 Danish men (response rate = 77.8%), ages 16-20 years, was interviewed about their first sexual intercourse. A cumulative frequency function was constructed and the median age at sexual debut was estimated at 16.8 years for both male and female. Generally the age difference between the partners at first intercourse was only a few years. However, the young women almost never reported their first sexual partner as younger than themselves. A cross-check was made of the information given by two homogeneous subsamples of the 47 young women and 80 young men who had their first sexual intercourse with a partner who was also a debutant. Self-reported age among the males differed significantly from the age of the first sexual partner as stated by the females in these subsamples. Therefore, there is bias in the reporting of age of partner at first intercourse. As the self-reported age at first sexual intercourse by young women agrees with the age of first partner as stated by young men, the bias seems to manifest itself predominantly as a systematic misreporting in the age of male partners of debutant females.

Adolescent↗
PubMed1989

Age at first intercourse.

In 1984-85 a representative sample of 286 Danish women and 336 men aged 16-20 years were interviewed about their sexual debut. Seventy-four females (25.9%) and 101 males (30.1%) had not yet experienced sexual intercourse. A maximum likelihood estimation method was used to establish the age distribution at sexual debut. This takes into account knowledge of age at interview among the non-experienced respondents and of the few who did not report age at sexual debut. The median age at first sexual intercourse was close to 16.8 years for both females and males. This appeared to be a consequence of age at debut declining among women and remaining unchanged among males during the preceding 20 years.

Adolescent↗