Nielsen Jacob Lauesgaard, Boelskifte Jane, Falk Jørgen, Lauszus Finn Friis, Rasmussen Kjeld Leisgård
Gynaekologisk Afdeling, Regionshospitalet Herning, DK-7400 Herning.
Ugeskr Laeger. 2009 Mar 30;171(14):1159-63.
The study surveys sexual activity, use of contraception at sexual debut and changes in sexual habits during a 21-year period.
A questionnaire was handed out on the same day in all ninth grade classes in the Municipality of Viborg. Neither teachers nor pupils were given prior notice. The results were compared with similar studies performed in 1986, 1993 and 2000.
A total of 394 of 398 questionnaires were answered and returned. In both genders, 40% had had debuted sexually. The frequency among the boys had increased in comparison with the previous 21 years. The amount of sexual debuts before the legal age of consent at 15 years was 18%, which is similar to previous years. In both genders an increased proportion had experienced coitus within the last week. Condoms were used by 76% and the pill by 15% at sexual debut. Subsequently, 27% shifted from condom use to pill use alone or in combination with a condom at the latest coitus; thus, 34% used the pill at their latest coitus. Practical experience with condoms was found in 90% of both genders among those who had debuted sexually, while 56% of the boys and 68% of the girls indicated that they had experience with the pill.
Knowledge of and use of condoms are widespread among adolescents already at sexual debut. A shift from the use of condoms to more frequent use of the pill occurs from debut to later coitus. A considerable amount of adolescents (10-20%) still do not protect themselves against sexually transmitted diseases and pregnancies at debut or later coitus.
本研究调查了21年间的性行为、首次性行为时的避孕措施使用情况以及性习惯的变化。
在维堡市的所有九年级班级于同一天发放问卷。教师和学生均未事先得到通知。将结果与1986年、1993年和2000年进行的类似研究进行比较。
398份问卷中共有394份被回答并返还。在男女两性中，40%的人已有过首次性行为。与之前的21年相比，男孩中的性行为频率有所增加。在法定同意年龄15岁之前发生首次性行为的比例为18%，与前几年相似。在男女两性中，过去一周内有过性交的比例均有所增加。首次性行为时，76%的人使用避孕套，15%的人使用避孕药。随后，27%的人在最近一次性交时从仅使用避孕套转变为单独使用避孕药或与避孕套联合使用；因此，34%的人在最近一次性交时使用避孕药。在已有过首次性行为的男女两性中，90%的人有使用避孕套的实际经验，而56%的男孩和68%的女孩表示他们有使用避孕药的经验。
避孕套的知识和使用在青少年首次性行为时就已广泛存在。从首次性行为到后来的性交，使用避孕套的情况转变为更频繁地使用避孕药。相当数量的青少年（10 - 20%）在首次性行为或后来的性交时仍未采取措施预防性病和怀孕。
