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Prevalence and risk factors for inter-generational Sex: a cross-sectional cluster survey of Barbadian females aged 15–19
© Drakes et al.; licensee BioMed Central Ltd. 2013
Received: 8 March 2013
Accepted: 21 November 2013
Published: 27 December 2013
The aim of this study was to establish the prevalence and risk factors for intergenerational (IG)-sex in females aged 15–19 residing in Barbados.
This cross sectional cluster survey was conducted in a 2.6% national sample in the age range (n = 261) recruited from multiple polling districts chosen with a probability proportional to size. Consent was obtained from participants aged ≥18 years or from parents/guardians of participants <18 years, with participant assent. The prevalence of age at first sex was analyzed using a life table approach and risk factors for IG sex (defined as sexual relations with a male 10 or more years older) were analyzed by logistic regression, adjusting for age.
51.0% of adolescent females in the survey reported ever having had sex, among whom prevalence of IG-sex was 13.2% (95% CI: 6.7-19.8) at first sex, 29.0% (22.3-35.7) within the preceding twelve months, and 34.8% (24.3-45.4) ever. Condom use at first sex was positively related to willingness to have sex (F statistic = 9.8, p = 0.001). The strongest determinant for IG-sex was age of sexual debut (age adjusted Odds Ratio [95% CI]: 0.58[0.41-0.83]), followed by money or gifts received from the partner (2.91[1.17-7.23] and self-esteem (0.33[0.11-0.95]).
The survey establishes a high rate of IG-sex in Barbados, a ‘high income’ country. Most insightful is that risk of IG-sex nearly halved for every year at which first sex was delayed. A high proportion of coerced sex was reported at first sexual experience and this was linked to poor condom use. Affirmative prevention approaches are recommended to boost self-acclamation of adolescent women within less coercive relationships, especially during their first sexual encounter.
The Caribbean region has the second highest prevalence of HIV worldwide, behind sub-Saharan Africa, and is one of two regions (the other being Africa) where the proportion of young women living with HIV in the 15–24 age group outnumbers males [1, 2]. In Barbados the overall prevalence of HIV remains higher in men, but in the age group 10–19 it is more prevalent in women . This signifies a major shift for a disease originally concentrated within the male population. Multiple, intergenerational and transactional sexual partnering, along with cultural norms and gender roles that limit women’s sexual health choices, are implicated as driving this epidemiologic transition to young women [3–5].
Inter-generational (IG)-sex is generally defined in the literature as heterosexual intercourse with a non-marital partner ten or more years older [6–8]. Also referred to as cross generational sex or the ‘sugar daddy’ syndrome, it is primarily characterised by relationships between younger women and older men [9, 10]. Research in Africa supports the existence of a link between IG-sex and HIV infection among adolescent females. In sub-Saharan Africa, adolescent women aged 15–24 were between 2 to 4 times more likely to be infected than their male contemporaries , while research by Kelly et al. (2003) identified large age differences in sexual relationships as a contributing factor to HIV prevalence . A study of adolescent women aged 15–24 in rural Zimbabwe concluded that each one-year increase in age difference between partners was associated with a 4 percent increase in risk of HIV infection .
Transactional sex, often defined as sex in exchange for financial or material gain, can place women’s health at risk [7, 12–15]. These relationships, commonly intergenerational, are linked with reduced condom use [4, 6]. The greater the asymmetry in partner age and wealth, the less room for sexual negotiation on the female’s part [9, 16–19]. Despite high levels of HIV awareness and education in the Caribbean, levels of reported condom use remain inconsistent [5, 20–23]. As in other parts of the world, the ability to exercise condom use by young females is impacted by entrenched gender stereotypes, cultural attitudes towards sex, asymmetric power distribution within relationships, sexual violence, and unequal access to resources [4, 17, 24–27].
Information on IG-sex is quite sparse for the Caribbean. However, Demographic Health Surveys and KABP studies have estimated IG-sex prevalence among sexually active females aged 15–19 years within the preceding 12 months ranging from 3.7% in St. Kitts & Nevis, 6% in The Dominican Republic, 7.6% in Dominica, 9.8% in Haiti, 17.4% in Antigua & Barbuda, and 17.7% in Grenada [20, 28]. Two focus group studies conducted in Jamaica indicated that girls having relationships with older men were regarded as ‘common’ and ‘normal’ among peers, though not necessarily by the family [29, 30]. A series of Demographic Health Surveys in African countries revealed a range of IG-sex prevalence in 15–19 year olds from 3.3% in Malawi, 9.6% in Ghana, 13.7% in Tanzania, 19.3% in Uganda, and 25.5% in Nigeria [31–35]. The transactional element that often characterizes these types of relationship is a strong motivating factor, not only through accruing material or social benefits but also by affirmation of self-worth [7, 36–38]. Indeed, the meaning of transactional sex within a given cultural context remains the subject of debate [38, 39].
Our survey therefore sought to measure prevalence of IG-sex as a primary outcome measure in a nationally representative survey, conducted in adolescent females aged 15–19 residing in Barbados. Determinants examined for IG-sex included transactional sex, age, age at first sex, religious worship, and psycho-social measures of self-esteem, sense of personal power, and peer pressure. The findings were contrasted with the determinants for sex with any age partner in the same survey population.
The study was completed among adolescent females aged 15 to 19 years, who were sampled from multiple polling districts (chosen with a probability proportional to size) to achieve a target 3.0% sample of the population of 15–19 year old women in Barbados (there were 10,045 women in this age range according to the adjusted 2000 census). The survey returned 261 completed questionnaires, an 87% response rate that yielded a final 2.6% sample of the population in the age group. The sample design was a two-stage random sample of girls aged between 15 and 19. Stage 1 consisted of selecting polling districts with probability proportional to size. The island is divided into 313 polling districts and a 5% sample of districts yielded 16 districts. The second stage of sampling was done by interviewers within each polling district, who selected every fifth household for inclusion after a randomly chosen start. All eligible girls within each household were selected for inclusion in the survey.
All surveys were conducted with informed consent and IRB approval, in accordance with the principles of the Declaration of Helsinki as revised in 2000. The survey was interviewer-administered with Youth Commissioners of the Youth Department selected on the basis of experience in fieldwork and working with young people. A number of provisions were taken to maintain confidentiality in this sensitive youth survey: interviewers were assigned to a polling district outside of the area in which they generally worked; deliberate non-recording of personal identifiers such as names and addresses ensured anonymity of respondents and confidentiality of the data collected; written informed consent was obtained from participants aged 18 years or older, or from parents/guardians of participants aged 17 years or younger, with the assent of the participant; parents or guardians were not permitted to sit-in on interviews. Interviewers were trained to answer any queries posed by the respondents or their parents/guardians. Ethical approval for the study protocol was obtained from the ethics committee serving the Barbados Ministry of Health and The University of the West Indies, as well as the IRB of the University of Southampton, UK.
The survey instrument was designed by The University of the West Indies (UWI) and The National HIV/AIDS Commission (NHAC) based on the Interpersonal Violence (IPV) survey and previous KABP surveys conducted in Barbados, Jamaica and several African states [22, 23, 26]. The questionnaire consisted of 98 items, all closed-ended questions, seeking to capture socio-demographic data on the target group as well as information on the respondent’s sexual history, economic indicators, the practice of transactional sex, relationship dynamics (same-age vs intergenerational partners), and possible determinants of sex (sense of self-esteem, personal power, peer pressure, perceived financial status, and religious worship attendance). Validated instruments included scales for peer pressure, personal power, and self-esteem [40–43]. “Pregnancy/STD Prevention” of the Sexual Assertiveness Scale (Morokoff) was included, but not subscales on “Initiation” and “Refusal” that were considered too sensitive for this youth survey . The experience at first sex, including condom use, willingness to have sex, and partner’s age, was assessed using questions asked in successive KABP surveys in Barbados . Religious worship was assessed with the question: “do you attend religious service?”, scored on a scale “never, a few times a year, monthly, weekly, more than weekly”. Perceived financial distress in this youth population was assessed by the following subjective statements: “I have enough money to cover my daily necessities” and “I have enough money to cover luxuries”, scored on a scale “strongly agree, agree, disagree, strongly disagree”. A pre-test of the survey instrument was conducted on a similar population to the respondent population with the aim of identifying any weaknesses in questionnaire design and providing practice for fieldworkers. Double data entry was performed to minimize transcription error.
Key outcome measures
The primary outcome measure was inter-generational sex. The UNAIDS definition of inter-generational relationships (also referred to as cross-generational) was used to guide the survey . IG Sex was therefore defined as heterosexual intercourse with an unmarried male partner 10 or more years older. IG prevalence was measured using 3 items: respondent self-reports of sexual intercourse with a male partner 10 or more years older at the first sexual encounter; sexual intercourse within the past 12 months with a male partner 10 or more years older; and ever having had sexual intercourse with a male partner 10 or more years older. Transactional sex is the exchange of money, food and other items for sex [10, 14, 15, 38]. The survey asked respondents if they had ever exchanged sex in exchange for money or gifts, and the question was repeated for same-age and older partners. Several predictors of IG sex were incorporated into the survey, some of which were based on individual items: age at first sexual encounter; age of first sexual partner; religious service attendance; and psychosocial variables of self-esteem, sense of personal power and peer pressure.
The prevalence rates for inter-generational sex (yes/no) were calculated with associated 95% confidence intervals for the following scenarios: at first sex, in the past 12-months, and ever. In secondary analyses, associations between selected sexual and psychosocial characteristics and the probability of reporting having had sex or inter-generational sex were examined used a series of logistic regression analyses, reporting odds ratios (unadjusted and age-adjusted) and their associated 95% confidence intervals. For all prevalence calculations and regression analyses, standard errors and 95% confidence intervals reflect the two-stage survey design and the increased correlation of participants recruited from a single household. Such survey designs inflate the standard errors of any point estimates, and a Taylor linearization was used for all variance estimation. The change in the proportion of respondents reporting sexual activity with age was quantified using a univariate logistic regression, and reported using an odds ratio and associated 95% confidence interval. To calculate the age at first sex a life table approach was used, which calculated the cumulative proportion having sex at each year of age up to 19. The technique allowed for those adolescents who had never had sex to be censored at their current age. Although all analyses relied on 95% confidence intervals to describe the strength of associations between possible predictors and model outcomes, for completeness p-values were occasionally calculated for primary associations of interest, and in these situations exact p-values were presented to clarify the strength of the statistical relationships. All analyses were performed using Stata statistical software (version 13, StataCorp LP, College Station, Texas, USA).
Characteristics of survey population stratified by sexual history
Selected characteristics of 259 Barbadian females aged 15 to 19, stratified by sexual history (never had sex, had sex but not inter-generational sex, had inter-generational sex)
Never had sex N = 127
Had sex but not inter-generational sex N = 86
Had inter-generational sex N = 46
Total N = 256
Age (n = 256)
Enough money to cover necessities (n = 251)
Enough money to cover luxuries (n = 245)
Do you attend religious services (n = 240)
Less than monthly
More than weekly
Age at first sex
Sexual history and inter-generational sex
Sexual history among 261 Barbadian females aged 15 to 19, and selected sexual characteristics among 134 Barbadian females who have had sex at least once
Sexual history: prevalence of sexual activity †
Ever had sex?
259 / 261
42.5 to 59.4
Ever had oral sex?
243 / 261
18.7 to 36.4
Ever had vaginal sex?
258 / 261
40.9 to 56.8
Ever had anal sex?
237 / 261
2.7 to 9.9
Sexual history: prevalence of Inter-Generational sex
At first sex
248 / 261
3.1 to 9.8
Within past 12 months
234 / 261
8.3 to 18.2
At any time
259 / 261
11.3 to 24.3
Characteristics among females who have had sex at least once
Inter-Generational sex at first sex
121 / 132
6.7 to 19.8
Inter-Generational sex in past 12 months
107 / 132
22.3 to 35.7
Inter-Generational sex ever?
132 / 132
24.3 to 45.4
Age of partner at first sex
121 / 132
10 or more years older
6.7 to 19.8
5 to 9 years older
15.6 to 35.7
Older, unsure how much
7.0 to 22.8
About the same age
37.8 to 54.7
Money or gifts from sexual partner?
125 / 132
43.5 to 66.9
Money or gifts from same-age partner?
61 / 69
24.2 to 49.4
Money or gifts from older partner?
61 / 69
21.3 to 46.0
Condom used at first sexual encounter?
125 / 132
40.4 to 68.4
Willingness at first sex?
130 / 132
wanted to have sex
52.6 to 72.0
persuaded to have sex
21.2 to 40.3
did not want to have sex
2.9 to 11.0
Sex in past 12 months?
129 / 132
70.7 to 92.1
Number of partners in past 12 months?
132 / 132
13.7 to 36.3
34.8 to 54.5
10.8 to 27.1
2.7 to 14.0
0.3 to 5.7
Determinants for the likelihood of having had sex (any-age partner)
Unadjusted and age-adjusted associations for ever having had sex (yes/no)
Unadjusted odds ratio (95% CI)
Age adjusted odds ratio (95% CI) †
1.87 (1.43 – 2.45)
Enough money to cover necessities
0.98 (0.64 – 1.49)
1.01 (0.64 – 1.60)
Enough money to cover luxuries
1.16 (0.70 – 1.92)
1.40 (0.76 – 2.57)
Religious service attendance (yes/no)
2.89 (1.82 – 4.60)
2.86 (1.85 – 4.41)
Frequency of religious service attendance ‡
6.78 (3.16 – 14.54)
7.91 (3.59 – 17.41)
Less than monthly
10.33 (2.48 – 43.01)
7.89 (1.96 – 31.81)
4.07 (1.48 – 11.17)
7.28 (1.88 – 28.12)
1.51 (0.61 – 3.72)
1.96 (0.76 – 5.04)
More than weekly
0.17 (0.06 – 0.44)
0.10 (0.03 – 0.37)
Sense of personal power
0.55 (0.27 – 1.14)
0.42 (0.20 – 0.85)
2.83 (1.65 – 4.86)
4.40 (2.34 – 8.29)
Determinants for inter-generational sex
Unadjusted and age-adjusted associations for inter-generational sex (yes/no) in females who had ever had sex
Unadjusted odds ratio (95% CI)
Age adjusted odds ratio (95% CI) †
1.16 (0.77 – 1.73)
1.56 (0.91 – 2.68)
Age at first sex
0.67 (0.50 – 0.90)
0.58 (0.41 – 0.83)
Condom use at first sex
1.58 (0.51 – 4.91)
0.66 (0.16 – 2.77)
Willingness at first sex
0.86 (0.45 – 1.62)
0.55 (0.26 – 1.78)
Enough money to cover necessities
1.21 (0.58 – 2.51)
0.99 (0.46 – 2.11)
Enough money to cover luxuries
0.72 (0.35 – 1.51)
0.60 (0.23 – 1.56)
Money or gifts from partner
3.35 (1.51 – 7.45)
2.91 (1.17 – 7.23)
Religious service attendance (yes/no)
1.48 (0.50 – 4.37)
0.88 (0.27 – 2.87)
Frequency of religious service attendance ‡
1.13 (0.22 – 5.90)
0.54 (0.08 – 3.54)
Less than monthly
1.00 (0.18 – 5.58)
0.72 (0.08 – 6.46)
0.60 (0.07 – 5.43)
0.64 (0.07 – 6.22)
0.57 (0.18 – 1.77)
0.44 (0.12 – 1.66)
More than weekly
0.32 (0.16 – 0.64)
0.33 (0.11 – 0.95)
Sense of personal power
0.77 (0.33 – 1.83)
1.10 (0.47 – 2.56)
1.42 (0.71 – 2.86)
1.42 (0.61 – 3.29)
Morokoff subscale (pregnancy/STD risk)
1.55 (0.84 – 2.86)
1.37 (0.58 – 3.22)
The present study is the first to report prevalence rates of IG-sex among adolescent females in Barbados in a nationally representative survey. The rate of IG-sex among sexually active females aged 15–19 is 29.0% (95% CI: 22.3 – 35.7), higher than the only existing survey data from the Eastern Caribbean and comparable to rates at the uppermost range in Africa [20, 28, 31–35]. The proportion of females who reported IG-sex at their first sexual experience, 13.2% (95% CI: 6.7 – 19.8), was consistent with a KABP survey conducted in Barbados in 2011 that reported 11.4% (unpublished). The relatively high rates of IG-sex reported here are therefore consistent with the claim made in the UNAIDS Caribbean Report of 2008 that it is ‘common practise’ among adolescent girls in the Caribbean to maintain relationships with older men .
The high rates of IG-sex were not expected based purely on an assumed link with poverty or lack of education among adolescent girls. In rural Africa, it has been established that poverty, in the context of poor access to education, healthcare, and employment opportunities, urges women into such relationships [7, 17, 45, 46]. Barbados is classified as a ‘high income’ country by the World Bank with a gini coefficient (a measure of income inequality) of 0.39 that places it between the the US (0.41) and the UK (0.36). Barbados also has one of the lowest rates of poverty in the Caribbean and Latin America, and has a high literacy rate according to the United Nations Development Program [47, 48]. Despite these favorable indicators and a high degree of knowledge of condom use identified in successive KABP surveys, the present survey uncovered evidence of relationship imbalances with age-disparate partnering particularly at sexual debut.
The first sexual experience was associated with forcible sex or pressure to have sex in nearly 40% of respondents, a worrying finding that is consistent with a pattern of sexual coercion, sexual abuse and high rates of interpersonal violence reported in the Caribbean literature [5, 19, 26, 49–53]. Condom use was strikingly related to willingness to have sex, with a distribution of 2:1:0 in girls who were either willing:persuaded:forced to have sex at their first sexual encounter.
The strongest predictor of IG-sex was the age at first sex. The median age at first sex was 17 years. On the face of it this is later than reported by other studies in the region but apparent discrepancies may be explained by the way age at first sex was reported and by gender differences [50, 54, 55]. The authoritative multi-country Caribbean Youth Health Survey (CYHS) survey is often quoted out of context . Commentators have reported the headline finding that nearly half of adolescents were 10 years or younger when they first had intercourse without stating the context that 65.9% of respondents in CYHS never had sexual intercourse. Furthermore, that headline figure included boys, in whom sexual initiation in the Caribbean has been consistently reported as occurring earlier than in girls [5, 20, 54–56]. Other regional studies have reported age at first sex as a mean, thereby failing to recognise the often skewed nature of ‘time to event’ data and possibly also failing to censor [37, 57]. Our survey was in line with other Caribbean surveys reporting the same median age indicator [5, 20]. The age of sexual initiation therefore remains a critical area for research influencing women’s health in the region, since age at first sex is a modifiable risk factor linked not only to IG-sex, as reported here, but also a cluster of high risk health behaviors in Caribbean girls, including smoking, alcohol and drug use, truancy, and gang membership [58–62].
Regular participation in religious worship (at least weekly) was statistically significantly associated with a lower chance of reporting a sexual encounter with any-age partner. This is consistent with previous reports in the Caribbean [63–66]. The logistic regression analysis showing a statistically significant downward trend in peer pressure index with religious service attendance, and frequency of attendance, supported the notion of an external influence of religion. However, we could not confirm an association of religious worship with IG sex. Other social network information on schools, families, influential individuals, neighbourhoods and activity groups coupled with a more comprehensive network analysis will therefore be required to better understand the impact of belief systems on the likelihood of engaging in sex or inter-generational sex in adolescent females [67, 68].
Finally, it was noted that a cluster of psycho-social variables - self-esteem, sense of personal power, and peer pressure – were differentially associated with IG-sex vs. sex with any-age partner. The three variables were related to each other and to sex with any-age partner, yet the cluster fractured when applied to IG-sex, with low self-esteem solely associated with IG-sex. The survey also identified a strong association of multiple partnering with IG-sex. It should be noted, however, that the direction of the associations with multiple partners and self-esteem were not clear: was low self-esteem or multi-partnering a predictor of IG-sex? Or was exposure to IG-sex a cause of low self-esteem or multiple partnering?
We acknowledge limitations of this relatively small cross sectional study. The directionality of association cannot be inferred from this cross sectional survey. For example, low self-esteem might be a reason for early sexual experience or for involvement in IG sex. On the other hand, early sexual experience and involvement in IG sex might be a reason for having low self-esteem. Further qualitative research will be required to tease out causality and motivating factors and how these might differ between intergenerational relationships and those with any-age partner. We acknowledge that the dividing line can be blurred as to what constitutes transactional sex and what constitutes the normal exchange of gifts in a loving relationship. Hence, we caution against drawing the conclusion that the receipt of money or gifts was necessarily a risk factor for IG-sex, at least based on this survey. We acknowledge that the use of an interviewer may contribute a source of bias in our survey, although we sought to mitigate against this possibility by using experienced youth commissioners and training interviewers not to lead participants in their responses.
In conclusion, the most powerful predictor of IG-sex in this survey was age at first sex, with the risk being halved for each additional year that sexual initiation was delayed. Although not a widely reported indicator, a proportion of 13.2% of girls having IG-sex at sexual initiation was undoubtedly high. Together with evidence here and across the Caribbean of widespread sexual coercion at first sex, with concominantly diminished condom use, this brings into sharp focus what protective programmes can be devised, besides risk reduction strategies, to help Caribbean girls re-balance the power in relationships particularly during their first sexual encounter [4, 5, 49]. The promotion of self-esteem in young women has been highlighted as a positive prevention approach in recently formulated policy by the National HIV/AIDS Commission of Barbados designed to remove gender stereotypes and boost self-acclamation of young women within more equitable sexual relationships .
The authors wish to acknowledge the assistance of Mrs. Lourdes Soriano-Rouco for data entry. The authors are particularly grateful for the professional work of the youth commissioners, Ministry of Youth, Family & Sports, who administered this survey and without whom this work would not have been possible.
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