Department of Obstetrics and Gynaecology, University of Chicago, 5841 S Maryland Avenue, MC2050, Chicago, IL 60637, USA.
BMJ. 2010 Mar 9;340:c810. doi: 10.1136/bmj.c810.
To examine the relation between health and several dimensions of sexuality and to estimate years of sexually active life across sex and health groups in middle aged and older adults.
Cross sectional study.
Two samples representative of the US population: MIDUS (the national survey of midlife development in the United States, 1995-6) and NSHAP (the national social life, health and ageing project, 2005-6).
3032 adults aged 25 to 74 (1561 women, 1471 men) from the midlife cohort (MIDUS) and 3005 adults aged 57 to 85 (1550 women, 1455 men) from the later life cohort (NSHAP).
Sexual activity, quality of sexual life, interest in sex, and average remaining years of sexually active life, referred to as sexually active life expectancy.
Overall, men were more likely than women to be sexually active, report a good quality sex life, and be interested in sex. These gender differences increased with age and were greatest among the 75 to 85 year old group: 38.9% of men compared with 16.8% of women were sexually active, 70.8% versus 50.9% of those who were sexually active had a good quality sex life, and 41.2% versus 11.4% were interested in sex. Men and women reporting very good or excellent health were more likely to be sexually active compared with their peers in poor or fair health: age adjusted odds ratio 2.2 (P<0.01) for men and 1.6 (P<0.05) for women in the midlife study and 4.6 (P<0.001) for men and 2.8 (P<0.001) for women in the later life study. Among sexually active people, good health was also significantly associated with frequent sex (once or more weekly) in men (adjusted odds ratio 1.6 to 2.1), with a good quality sex life among men and women in the midlife cohort (adjusted odds ratio 1.7), and with interest in sex. People in very good or excellent health were 1.5 to 1.8 times more likely to report an interest in sex than those in poorer health. At age 30, sexually active life expectancy was 34.7 years for men and 30.7 years for women compared with 14.9 to 15.3 years for men and 10.6 years for women at age 55. This gender disparity attenuated for people with a spouse or other intimate partner. At age 55, men in very good or excellent health on average gained 5-7 years of sexually active life compared with their peers in poor or fair health. Women in very good or excellent health gained 3-6 years compared with women in poor or fair health.
Sexual activity, good quality sexual life, and interest in sex were higher for men than for women and this gender gap widened with age. Sexual activity, quality of sexual life, and interest in sex were positively associated with health in middle age and later life. Sexually active life expectancy was longer for men, but men lost more years of sexually active life as a result of poor health than women.
研究健康与性的几个方面之间的关系，并估计中年和老年人群中具有性活跃的生命年限。
横断面研究。
美国人口的两个样本：MIDUS（美国中年发展全国调查，1995-6 年）和 NSHAP（全国社会生活、健康和老龄化项目，2005-6 年）。
3032 名 25 至 74 岁的成年人（1561 名女性，1471 名男性）来自中年队列（MIDUS）和 3005 名 57 至 85 岁的成年人（1550 名女性，1455 名男性）来自老年队列（NSHAP）。
性活动、性生命质量、性兴趣以及平均具有性活跃的剩余年限，称为性活跃预期寿命。
总体而言，男性比女性更有可能进行性活动、报告良好的性生活质量、并对性感兴趣。这些性别差异随着年龄的增长而增加，在 75 至 85 岁的年龄组中最大：38.9%的男性与 16.8%的女性进行性活动，70.8%的性活跃者与 50.9%的性活跃者有良好的性生活质量，41.2%的性活跃者与 11.4%的性活跃者对性感兴趣。与健康状况不佳或一般的同龄人相比，报告非常好或极好健康状况的男性和女性更有可能进行性活动：中年研究中的年龄调整比值比为 2.2（P<0.01），男性为 1.6（P<0.05），老年研究中的年龄调整比值比为 4.6（P<0.001），女性为 2.8（P<0.001）。在性活跃人群中，良好的健康状况也与男性的频繁性活动（每周一次或更多）显著相关（调整比值比为 1.6 至 2.1），与中年队列中男性和女性的良好性生活质量相关（调整比值比为 1.7），以及与性兴趣相关。与健康状况较差的人相比，健康状况非常好或极好的人报告性兴趣的可能性高 1.5 至 1.8 倍。在 30 岁时，男性的性活跃预期寿命为 34.7 年，女性为 30.7 年，而 55 岁时，男性为 14.9 至 15.3 年，女性为 10.6 年。对于有配偶或其他亲密伴侣的人来说，这种性别差距会减弱。在 55 岁时，与健康状况不佳的同龄人相比，健康状况非常好或极好的男性平均获得了 5-7 年的性活跃寿命。健康状况非常好或极好的女性与健康状况不佳的女性相比，获得了 3-6 年的性活跃寿命。
男性比女性更活跃、性生活质量更高、对性更感兴趣，而且这种性别差距随着年龄的增长而扩大。在中年和老年时，性活动、性生活质量和性兴趣与健康呈正相关。男性的性活跃预期寿命较长，但由于健康状况不佳，男性失去的性活跃生命年限比女性多。
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