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Biomedical subjects

H Wielandt

Publications and source records attributed to H Wielandt.

8 recordsLinked to original sources
PubMed1991

Prevalence of smoking and oral contraception in a sample of Danish young women.

A representative sample of 286 Danish females aged 16-20 years were interviewed during the period April 1984--February 1985. The response rate was 75%. Both use of oral contraception (OC) and smoking were common; 46.6% used OC, 34.2% smoked and 19.6% combined smoking and OC. The prevalence of smoking was significantly higher (42.0%) among OC-users than among non-users (27.2%). The combination of smoking and OC was especially prevalent among young women with sexual debut before 16 years (36.8%). The association between smoking and the use of OC was significant both when tested unstratified (p less than 0.05) and stratified by age at sexual debut (p less than 0.01). Smoking was also associated with early debut of intercourse (p less than 0.001). It has been reported that the combination of these two factors in adult women increase the risk for cardiovascular mortality. However, the health consequences later in life of combining smoking and OC at young ages have not been illuminated in the literature. These findings indicate the necessity for prospective studies of young women.

Adolescent↗
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↗
PubMed1989

Sexual behavior, contraception and unintended pregnancy among young females.

Information about contraceptive usage and sexual experiences was sampled in 1985-86 from 16-20-year-old Danish females admitted for legally induced abortion on Funen (N = 140). In attempts to elucidate the causal relations behind undesired pregnancy among teenagers, data were in the present context compared with answers to the same questions from a representative Danish sample of sexually experienced, non-pregnant females of the same age (N = 201). Of the reference sample, 83.6% were using contraceptives at the time of the interview--mostly oral contraceptives (O.C.). Of the abortion sample, 90.7% said they had used contraception earlier in their reproductive life. Approximately one third conceived in spite of contraception (most frequently the condoms). O.C. was the contraceptive method used most recently (by 43.6%). Thus, a pause in an effective contraceptive often precedes an unintended pregnancy, pointing to the need for follow-up counselling when O.C. is prescribed to teenagers. Only the minority could state the total number of times they had experienced sexual intercourse. Significantly more females in the abortion sample were in an alliance with a male partner with whom they had regular sexual intercourse. However, they also reported a higher average number of different sexual partners, indicating an association between changing sexual relationships and undesired pregnancy. In the abortion sample significantly more pregnancies prior to the index pregnancy were reported during a corresponding period of risk of conception lasting only a few years. Taking the widespread use of contraception into account, it is possible that an increased fecundity might be a co-factor behind unsuccessful contraception.

Adolescent↗
PubMed1988

Contraceptive use in a sample of young Danish females.

During the period April 1984-February 1985, 4 test samples of totally 380 young Danish women aged 16-20 years old were invited to interview about contraception and sexual behaviour. The response rate was 75.3%. There were 208 (74.0%) who had had sexual debut. Median age was estimated to 16.8 years. At first intercourse 168 (80.8%) used contraception, 36.5% used condom and 36.1% oral contraception (OC). Among teenage-girls with sexual debut before 15 years old 32.5% were unprotected against pregnancy. At the time of the interview 64.4% did use contraception. The most frequently used contraceptive device was OC (46.6%). Teenage-girls changed the contraceptive method from condom to OC after sexual debut. A small proportion of sexually active girls (8%) did not use contraception neither at first intercourse nor at the moment.

Adolescent↗