The Global Study of Sexual Attitudes and Behaviors (GSSAB) is an international survey of various aspects of sex and relationships among adults aged 40–80 y. An analysis of GSSAB data was performed to estimate the prevalence and correlates of sexual problems in 13 882 women and 13 618 men from 29 countries. The overall response rate was modest; however, the estimates of prevalence of sexual problems are comparable with published values. Several factors consistently elevated the likelihood of sexual problems. Age was an important correlate of lubrication difficulties among women and of several sexual problems, including a lack of interest in sex, the inability to reach orgasm, and erectile difficulties among men. We conclude that sexual difficulties are relatively common among mature adults throughout the world. Sexual problems tend to be more associated with physical health and aging among men than women.
There is an ongoing debate regarding the nature of gender differences in sexual problems.1 One feature of this debate centers on the extent to which biological, psychosocial, and cultural factors each contribute to these various difficulties. Yet, assessments of their relative influence on the prevalence of sexual problems have been hampered by the lack of systematic, cross-cultural population studies. A recent review of 52 studies on sexual dysfunctions, for example, found that few were based on broadly representative samples, and even fewer included information on multiple sexual problems in both women and men.2 Indeed, the majority of studies typically focus on erectile dysfunction (ED). With most epidemiological studies focused on North American and Western European populations, findings from other regions of the world are often based on smaller studies involving clinical series or other samples that are not broadly representative. The Global Study of Sexual Attitudes and Behaviors (GSSAB) was recently conducted to investigate health status, as well as attitudes, beliefs, behaviors, and satisfaction regarding sex and relationships among middle-aged and older adults in 29 countries.
The objectives of the current analysis of the GSSAB include the following: (1) to estimate the prevalence of sexual problems among women and men for seven regional clusters and (2) to identify factors that increase the likelihood of reporting selected, common sexual problems by gender and regional cluster.
The GSSAB is the first large, multi-country survey to systematically study attitudes, beliefs, and health in sexual relationships in middle-aged and older adults. The survey involved 13 882 women and 13 618 men, aged 40–80 years, in 29 countries, representing many world regions. In Europe (Austria, Belgium, France, Germany, Italy, Spain, Sweden, and the United Kingdom), North America (Canada and USA), Australia, New Zealand, Israel, and Brazil, samples were based on random-digit-dialing and respondents were selected randomly within households by asking for the person between 40 and 80 y of age with the most recent birthday. Sampling in Middle Eastern countries (Algeria, Egypt, Morocco, and Turkey) employed a door-to-door protocol, where households were selected using random starting points, and the study staff contacted every third house in several major cities. In Asian countries (China, Hong Kong (although Hong Kong is part of China, it is listed separately because of its distinct socioeconomic and cultural characteristics), Korea, Indonesia, Malaysia, Philippines, Singapore, Taiwan, and Thailand), an intercept protocol was employed in major cities. Both the door-to-door and intercept protocols represent accepted survey methods for each country, but are likely to be more reflective of their urban populations. The standard sample size of 1500 (equal numbers of men and women) was used in Germany, Sweden, UK, France, Italy, Spain, Australia, Turkey, and Japan. A sample size of 500 was used in Austria, Belgium, New Zealand, Algeria, China, Hong Kong, Taiwan, Indonesia, Malaysia, Philippines, Singapore, and Thailand. In the remaining countries, the sample sizes were: Israel 505, Canada 1007, South Africa 999, USA 1491, Brazil 1199, Mexico 506, Egypt 584, Morocco 509, and Korea 1200.
In Europe, North America, Australia, New Zealand, Israel, and Brazil, telephone interviews were conducted via Computer-Assisted Telephone Interview (CATI). Due to the sensitive nature of the topic, refusals were not called back. The door-to-door and intercept protocols employed in Algeria, Egypt, Morocco, Turkey, China, Korea, Taiwan, Indonesia, Malaysia, the Philippines, Singapore, South Africa, and Thailand used self-completed questionnaires. There were two exceptions to the above-mentioned data-collection strategy. In Japan, a mailed, self-completed questionnaire was used, and in Mexico, a mixed-mode method of in-person and telephone interviews was employed. The mean overall response rate was 19%, with the mean rate for the telephone interviews at 15% and 30% for the self-completed questionnaires and 33% for the mailed, self-completed questionnaires used in Japan. Response rate ranged from 8–55% in the various countries.
Verbal consent was obtained from all study participants. They were also informed about the following issues: (1) all information obtained would be used in aggregate, (2) responses were voluntary, (3) the confidentiality and the privacy of their responses were protected because no personal identifiers were coded into the interview instruments, (4) no list of respondents was retained, and (5) ‘refusers’ were not called back in an effort to convert them to participating respondents.
The questionnaire asked for information about demographics; health; relationships and general satisfaction with life as a whole; as well as individual behavior, practices, attitudes, and beliefs regarding sexuality. The presence of sexual problems was assessed using the following question: ‘During the last 12 months have you ever experienced any of the following for a period of 2 months or more when you: (1) lacked interest in having sex; (2) were unable to reach climax (experience orgasm); (3) reached climax (experienced orgasm) too quickly; (4) experienced physical pain during sex; (5) did not find sex pleasurable; (6) had trouble achieving or maintaining an erection (men only); and (7) had trouble becoming adequately lubricated (women only)?’. Respondents were permitted to answer yes to all that applied. For those indicating the presence of a specific sexual problem, the relative severity was assessed in a follow-up question: ‘For each of these experiences, how often would you say this has occurred during the last 12 months? Would you say that this has occurred occasionally, sometimes, or frequently?’.
We restricted our analyses to only those respondents who had had intercourse at least once in the year prior to being interviewed. This procedure reduced our sample size to 9000 women and 11 205 men and tended to drop older respondents, who were sexually inactive more frequently. Thus, the prevalence of sexual problems was calculated by dividing the total number of self-reports for each problem by the total number of respondents, who were sexually active in the year prior to being interviewed, by gender. Country-specific data were grouped into clusters, according to geographic proximity, shared cultural backgrounds, and similar modes of data collection. Using the age distribution of the entire sample in the GSSAB for women and men separately, we age-standardized the prevalence estimates for each regional cluster.
A number of possible correlates of sexual problems were investigated. These included age, self-reported measures of general health status, current level of physical activity, self-report of a diagnosed vascular condition (including hypertension, diabetes, heart disease, high cholesterol, and having had a stroke), self-report of a diagnosis of depression, prostate disease (among men), having had a hysterectomy (among women), and whether respondents currently or formerly smoked. Respondents also reported how often they thought about sex—a proxy for their current level of sexual libido—and whether they agreed with the belief that aging reduced sexual desire and/or behavior. Other self-reported measures included educational attainment, whether respondents believed that their religion guided their sexual behavior, experience with divorce and financial problems in the 3-y period prior to being interviewed, the expected time horizon of their current relationships, the frequency of engaging in sex, whether they usually engaged in foreplay, and whether they were sexually exclusive.
We utilized logistic regression in this study. This approach produced adjusted odds ratios (ORs), which indicate the odds of reporting the particular sexual problem among those with a given characteristic (eg poor health) relative to people in a reference category (eg good health), controlling for all other factors in the regression analysis. In these analyses, the presence of a sexual problem included only those respondents who reported ‘sometimes’ or ‘frequently’ having the problem (ie those who indicated ‘occasionally’ were recoded to indicate no sexual problem). In order to evaluate the validity of pooling a specific country with the others in a regional cluster, we employed a series of interaction models between covariates and country dummy variables to test whether a specific country could be pooled in an analysis. Countries with covariate patterns that were significantly different from the pooled sample were dropped from the analysis (results are available upon request). Thus, we dropped the following countries: (1) Austria, the UK, France, Italy, South Africa, Algeria, Taiwan, Indonesia, Philippines, and Singapore in logistic regressions of orgasm problems; (2) Sweden, Israel, Mexico, Egypt, Taiwan, and Philippines in logistic regressions of lubrication difficulties, (3) Morocco, Korea, Malaysia, Philippines, and Singapore in logistic regressions of early ejaculation; and (4) the UK, South Africa, Algeria, Morocco, Korea, Malaysia, and Thailand in logistic regressions of erectile difficulties.
Prevalence of sexual problems among women and men
Tables 1a and b present the prevalence of sexual problems of 2 months or more duration, subdivided by frequency of occurrence, among women and men, respectively. In most cases, the reported prevalence of sexual problems was higher in East Asia and Southeast Asia than in other regions of the world. For women, lack of interest in sex and inability to reach orgasm were the most common sexual problems across the world regions, ranging from 26 to 43% and 18 to 41%, respectively. For men, early ejaculation was the most common complaint, with 31% of men interviewed in Southeast Asia reporting this problem. Finally, erectile difficulties among men and lubrication difficulties among women were both relatively common and showed similar prevalence across most regions. Notable exceptions were East Asia and Southeast Asia, where the prevalence of both complaints was approximately double that reported in other regions.
Factors associated with the likelihood of reporting sexual problems
We analyzed the factors associated with the likelihood of reporting sexual problems among women and men. We focused on more severe problems: only those respondents indicating a periodic (sometimes) or frequent sexual problem in the 12 months prior to being interviewed were coded as having that particular problem. Here we present detailed analyses of four selected problems: the inability to reach orgasm and lubrication difficulties for women; early ejaculation and erectile difficulties among men.
Women's inability to reach orgasm
Table 2 presents logistic-regression results for factors associated with the likelihood of reporting an inability to reach orgasm among women. Age does not appear to be systematically associated with this problem, although several regions show some positive associations. Poor health tends to increase the likelihood of orgasm difficulties, but is only statistically significant in the non-European West (OR=1.6) and East Asian (OR=1.5) populations. In contrast, thinking about sex is associated with a decreased likelihood of this problem.
Most other factors, including physical inactivity, vascular diseases, having had a hysterectomy, smoking, and beliefs about aging and sexual energy show inconsistent associations. Financial problems and depression consistently show positive associations, however, few of the odds ratios reach statistical significance. Relationship characteristics such as partnership status, the frequency of sex, and foreplay are generally nonsignificant, although women who have low expectations about the future viability of their relationship(s) are consistently more likely to report this problem.
Women's lubrication difficulties
Table 3 presents logistic-regression results for factors associated with the likelihood of reporting lubrication difficulties. Increasing age shows a curvilinear association with the likelihood of reporting this problem in all the world regions except for Southeast Asia and South America. Women aged 50–59 y in comparison with those aged 40–49 y are roughly twice as likely to report lubrication difficulties across several regions, including Northern Europe (OR=2.1), Southern Europe (OR=1.9), the non-European West (OR=1.7), East Asia (OR=2.2), and the Middle East (OR=2.6). However, their counterparts, who are 70–80 y old, are no more likely to report this problem than the youngest cohort in most regions of the world.
Most physical status factors are not associated with lubrication difficulties, but having had a hysterectomy is consistently associated with a lower likelihood of this problem. With the exception of Southern Europe, belief in religion guiding sex is associated with consistently raised odds ratios, although statistical significance is seen only in East Asia.
Women with lower educational attainment are less likely to report problems with lubrication in several world regions. Also, women who have been diagnosed with depression in the past are greater than one and one-half times more likely to report this problem in Southern European (OR=1.8), non-European Western (OR=1.8), Central/South American (OR=1.8), Middle Eastern (OR=1.6), and Southeast Asian (OR=1.6) country clusters.
Men's early ejaculation
Table 4 presents logistic-regression results for factors associated with the likelihood of reporting early ejaculation. Vascular diseases initially seemed to be correlated with an increased probability of reporting early ejaculation; however, it appears that this association was confounded by ED, likely due to confusion about the two conditions in the respondents. After controlling for ED, early ejaculation was correlated with vascular diseases only in the Middle East.
In general, education is negatively associated with this problem; men without a college education are twice as likely to report this problem in Central/South America (OR=2.3–2.6) and the Middle East (OR=2.2–2.3). Experience with financial problems elevates the likelihood of reporting early ejaculation, but this is statistically significant only in the Middle East (OR=1.8). Infrequent sex tends to be associated with the likelihood of this problem. Overall, these models had the least explanatory power in this study.
Men's erectile difficulties
Table 5 presents logistic-regression results for factors associated with the likelihood of reporting erectile difficulties. Aging effects are quite strong across most regions with respect to erectile difficulties. In all regions, except Central/South America and Southeast Asia, men aged 60–80 y are significantly more likely to report erectile difficulties than those aged 40–49 y (OR from 2.7 to 6.9). Physical factors, such as a history of vascular conditions and prostate disease, are also relevant. Having had a vascular condition increases the likelihood of erectile difficulties in almost all world regions, with ORs ranging from 1.4 to 4.4. Prostate disease consistently increases the likelihood of erectile difficulties in all world regions as well, but is only statistically significant in Northern Europe (OR=1.8) and Southern Europe (OR=2.0).
Regarding the remaining factors, financial problems elevate the likelihood of erectile difficulties in several world regions, including Northern Europe (OR=2.3), Southeast Asia (OR=2.2), and the Middle East (OR=3.1). Moreover, men with a history of depression are also more likely to report problems with erections, although these findings are statistically significant only in Southern Europe (OR=1.9) and the non-European West (OR=1.9). Finally, several relationship characteristics are relevant as well. Men in uncommitted relationships tend to experience these problems more, and erectile difficulties appear to be highly associated with infrequent sex.
Other sexual problems
We also examined several additional sexual problems using logistic regression, including a lack of interest in sex (Table 6), pain during sex (Table 7), and non-pleasurable sex (Table 8) among women and a lack of interest in sex (Table 9), the inability to orgasm (Table 10), and nonpleasurable sex (Table 11) among men.
For women, a lack of interest in sex is associated with the belief that aging reduces sexual desire and activity (OR from 1.2 to 1.8), thinking about sex infrequently (thinking about sex more frequently is associated with OR from 0.3 to 1.0), depression (OR from 1.3 to 2.2), low expectations about the future of the relationship (lower expectations are associated with OR from 1.2 to 3.1 in all regions except Southeast Asia (OR=0.5)), and infrequent sex (less frequent sex is associated OR from 1.0 to 3.1, within all regions except East Asia (OR=0.9)) (Table 6).
Factors associated with pain during sex among women include younger age (the effect shows considerable variability between regions), poor health (OR from 1.0 to 2.1), infrequent sex (OR from 1.0 to 2.6), and low expectations about the future of the relationship (there is some variability between regions, however, lower expectations were usually associated with increasing likelihood of the problem (Table 7)).
With respect to nonpleasurable sex among women, thinking about sex infrequently (with thinking of sex never or less than once a month as the referent, sexually active women who thought about sex at least a few times a month had OR from 0.2 to 0.7), the belief that aging reduces sexual energy (OR from 1.3 to 1.7 in all regions except Central South America (OR=0.9)), depression (OR from 1.0 to 3.9), and low expectations about the future of their relationship (OR from 1.2 to 3.4 in all regions except Southeast Asia (OR=0.6)) all elevate the likelihood of reporting this problem (Table 8).
For men, a lack of interest in sex is associated with older age (OR up to 10.6, with considerable variability between regions), poor health (OR from 0.8 to 2.6), thinking about sex infrequently (with thinking of sex never or less than once a month as the referent, sexually active women who thought about sex at least a few times a month had OR from 0.1 to 0.9 in all regions except Middle East (OR=1.2)), depression (OR from 1.5 to 2.9 in all regions except East Asia (OR=0.9)), and infrequent sex (OR from 1.6 to 6.7 in all regions except Middle east (OR=0.7)) (Table 9).
Factors associated with the inability to orgasm include age (OR up to 7.7, with considerable variability between regions) and prostate disease (OR from 1.0 to 7.0) (Table 10). Finally, nonpleasurable sex is associated with poor health (OR from 1.1 to 4.8), financial problems (OR from 1.1 to 3.2 in all regions except Central/South America (OR=0.9)), and infrequent sex (OR up to 9.9, with some variability between regions and in Central/South America the opposite trend is seen (OR 0.6 and 0.8)) (Table 11).
A number of sexual problems were found to be frequent in this large sample of women and men aged 40–80 y. Physical, social/emotional, and relationship factors were all found to have a significant impact on the prevalence of one or more sexual problems. In addition, we observed an important gender difference: increasing age was more consistently associated with sexual problems among men. Thus, sexual problems among women and men appear to share similar correlates, but physical factors may play a larger role among men. However, as men age, there may be more psychological and relationship issues as well that influence their sexual satisfaction and performance.
The Global Study on Sexual Attitudes and Behaviors was funded by Pfizer Inc. We acknowledge the contribution of our colleagues on the international advisory board for this study: Jacques Buvat (France), Gerald Brock (Canada), Uwe Hartmann (Germany), Sae-Chul Kim (Korea), Rosie King (Australia), Bernard Levinson (South Africa), Ken Marumo (Japan), and Ferruh Simsek (Turkey).
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International Journal of Impotence Research (2018)