日本年轻人异性经验缺乏的趋势：1987-2015 年全国调查分析。
Trends in heterosexual inexperience among young adults in Japan: analysis of national surveys, 1987-2015.
机构信息
Department of Global Health Policy, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-0033, Japan.
Clinical Epidemiology Division, Department of Medicine, Solna, Karolinska Institutet, 17071, Stockholm, Sweden.
出版信息
BMC Public Health. 2019 Apr 8;19(1):355. doi: 10.1186/s12889-019-6677-5.
BACKGROUND
It has been suggested that an increasing number of Japanese adults remain sexually inexperienced; however, no study has assessed this issue using nationally representative data.
METHODS
We used data from seven rounds of the National Fertility Survey of Japan, 1987-2015, and included adults aged 18-39 years (18-34 years in the 1987 survey) in the analyses (sample size 11,553-17,850 [1987-2010]; response rate 70.0-92.5%). For each survey year, sex and age group, we estimated the age-adjusted prevalence of heterosexual inexperience, defined as reporting no experience of sexual intercourse with someone of the opposite sex. We used logistic regression, adjusted for age, to identify factors associated with heterosexual inexperience in the 2010 survey. Information about same-sex sexual experience was not available.
RESULTS
Between 1992 and 2015, the age-standardized prevalence of heterosexual inexperience in adults aged 18-39 years increased from 21.7 to 24.6% for women (p-values for linear and quadratic trend < 0.05) and from 20.0 to 25.8% for men (p-values for trend < 0.05). Among those aged 30-34 years, the prevalence was 6.2% in 1987 and 11.9% in 2015 for women (p-values for trend ≥0.05) and 8.8% (1987) and 12.7% (2015) for men (p-values for trend ≥0.05). Among those aged 35-39 years, prevalence increased from 4.0% in 1992 to 8.9% in 2015 among women (p-values for trend < 0.05). The corresponding numbers for men in the same age group were 5.5 and 9.5%, respectively (p-values for trend ≥0.05). Among men aged 25-39 years, unemployment, temporary/part-time employment and lower income were associated with heterosexual inexperience.
CONCLUSIONS
The proportion of young Japanese adults with no experience of heterosexual intercourse had increased in the past two decades. Among adults in their thirties, around one in ten had no heterosexual experience. Unemployment, temporary/part-time employment and low income were associated with heterosexual inexperience among men. Further research is needed on the factors contributing to and the potential public health and demographic implications of the high proportion of the Japanese population that remains sexually inexperienced well into adult age.
背景
据报道，越来越多的日本成年人仍然没有性经验；然而，尚无研究使用具有代表性的全国数据来评估这一问题。
方法
我们使用了日本全国生育力调查的七轮数据（1987-2015 年），并将 18-39 岁的成年人纳入分析（1987 年调查中为 18-34 岁；样本量为 11553-17850[1987-2010 年]；应答率为 70.0-92.5%）。对于每个调查年份，我们按性别和年龄组估计异性恋无经验的年龄调整患病率，定义为报告与异性没有性经历。我们使用逻辑回归，按年龄调整，以确定 2010 年调查中异性恋无经验的相关因素。没有关于同性性经验的信息。
结果
1992 年至 2015 年间，18-39 岁女性异性恋无经验的标准化流行率从 21.7%上升至 24.6%（线性和二次趋势的 p 值均<0.05），男性从 20.0%上升至 25.8%（趋势的 p 值均<0.05）。在 30-34 岁年龄组中，女性的流行率从 1987 年的 6.2%上升至 2015 年的 11.9%（趋势的 p 值均≥0.05），男性从 1987 年的 8.8%上升至 2015 年的 12.7%（趋势的 p 值均≥0.05）。在 35-39 岁年龄组中，女性的流行率从 1992 年的 4.0%上升至 2015 年的 8.9%（趋势的 p 值<0.05）。同一年龄组男性的相应数字分别为 5.5%和 9.5%（趋势的 p 值均≥0.05）。在 25-39 岁的男性中，失业、临时/兼职就业和低收入与异性恋无经验有关。
结论
在过去二十年中，日本年轻成年人中没有异性性经验的比例有所增加。在 30 多岁的成年人中，约有十分之一的人没有异性性经验。失业、临时/兼职就业和低收入与男性的异性恋无经验有关。需要进一步研究导致日本人口中很大一部分人在成年后仍然没有性经验的因素，以及这一比例较高对公共卫生和人口统计学的潜在影响。
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