Contrary to our hypothesis, our findings do not suggest an association between any of the three constructs of DEB (emotional, restrained and external eating) and SRTB. We had hypothesised that DEB would be associated with SRTB as reported in previous studies [30, 51–53]. We propose four explanations for the absence of association. First, most studies reporting associations between DEB and SRTB were conducted in HICs[30, 51–53]. It is possible that the socio-economic differences between HICs (where most of the studies reporting an association between DEB and SRTB were conducted) and low and middle income countries (LMICs [(where the current study was conducted) could explain the differences in the findings. Specifically, there is an increased emphasis on thinness in HICs. Such emphasis could impact body perception and eventually eating habits leading to DEB [54]. One potential explanation for the increased emphasis on thinness in HICs is social pressure. Specifically, social pressure regarding thinness and attractiveness, internalization of societal beauty ideals and body dissatisfaction [55] which have been shown to be high in HICs [56]. EmA especially young women, are exposed to societal messages about the physical characteristics associated with being beautiful, the importance of being thin, and how being attractive is seen as a characteristic of being successful in life, relationships and career [33]. Because of the discrepancy between the actual body outlook of EmA and what they consider to be the ideal body image, this is thought to lead to body image concerns and eventually DEB [57]. Apart from social pressure, another aspect of the sociocultural model explaining the increased emphasis on thinness in HICs is the influence of modern media which people in HICs have easy access to compared to LMICs [54]. Even with increasing urbanization, media access in LMICs remains comparatively lower. The disparity in media access, and consequently the influences of media, between the two settings imply a variation in societal preference for thinness and may explain the lack of association between DEB and SRTB in LMICs whereas an association has been found in HICs.
Secondly, previous studies assessed SRTB outcomes in isolation without considering that SRTBs tend to cluster together [30, 51–53]. Taking SRTB clustering into account, our study combines seven SRTBs into one endpoint. It is possible that the differences in outcome definition between our study and previous studies may have contributed to the observed differences in results. One study however did not find an association between DEB and SRTB just like ours [53]. The study was carried out in USA and enrolled adolescent women aged 14 years and above. The study found that women with DEB experienced later ages of first birth and lower parity compared to their counterparts without DEB.
Thirdly, we used the DEBQ tool to assess DEB. Since the tool has not been validated for use in the local Kenyan context, this may partially explain the lack of association with SRTB.
Finally, it is possible that there simply is no association between DEB and SRTB in this population.
Our findings imply that in LMICs like Kenya, interventions targeted at DEB among EmA towards controlling SRTB are unnecessary since our findings suggest lack of an association between the two. However, our results need to be interpreted with caution given that some studies have reported an association between DEB and SRTB as well as other risky behaviors including alcohol use [58], tobacco use [59] and illicit drug use. Further, DEB may adversely impact other health indicators including mental health disorders in developed settings [60], though this has not been extensively studied in LMICs and warrants further investigations.
We recommend more studies in Africa and other low-income settings to validate our findings that there is no association between DEB and SRTB. This is important especially now that Africa is experiencing an increased rate of urbanization. With increasing urbanization, body image concerns which potentially predispose to DEB are gaining momentum in Africa especially among urban EmA.
Our study is not without limitations. First, we collected data on binge eating and controlled for it in our analysis. However, we did not collect data on similar eating behaviors like anorexia and bulimia. This may have negatively impacted our ability to disentangle the relationship between DEB and SRTB which was not existent in our findings. Secondly, we used the DEBQ tool, which has not been validated for the local context, and may have resulted to the lack of an association with SRTB. There is need to develop and validate locally relevant eating behavior tools that can be applied and are appropriate for LMICs. Finally, the mean WHR obtained by assessor one differed from that of assessor two which may have impacted our analysis. However, none of the three DEB constructs showed an association with latent high SRTB even after excluding WHR from the multivariable logistic regression model (data not shown).
In conclusion, we obtained two latent SRTB classes from seven SRTBs and observed that there was no significant association between DEB and latent high SRTB. Our findings suggest that more studies, in different sSA settings are needed to find if indeed there is no association between DEB and SRTB in order to lay a strong evidence base for public health interventions on SRTB in this and similar settings.
Table 1
Characteristics of sexually active emerging adults attending a tertiary learning institution in Coastal Kenya
Characteristics | Category | Male | Female | Overall |
| | (n = 163) | (n = 110) | (N = 273) |
| | N [%] | N [%] | N [%] |
Socio-demographic and clinical indicators | | | | |
Age [years] Mean [SD] | - | 21.2 [1.5] | 20.7 [1.5] | 21.0 [1.6] |
Age group [Years] | 18–20 | 57 [35.0] | 56 [50.9] | 113 [41.4] |
| 21–24 | 106 [65.0] | 54 [49.1] | 160 [58.6] |
Year of study | Year 1 & 2 | 92 [56.4] | 63 [57.3] | 155 [56.8] |
| Year 3 & 4 | 71 [43.6] | 47 [42.7] | 118 [43.2] |
Study program was your first choice | No | 47 [28.8] | 37 [33.6] | 84 [30.8] |
| Yes | 116 [71.2] | 73 [66.4] | 189 [69.2] |
Ever been tested for HIV | No | 126 [77.3] | 86 [78.2] | 212 [77.7] |
| Yes | 37 [22.7] | 24 [21.8] | 61 [22.3] |
Have children? | No | 156 [95.7] | 99 [90.0] | 255 [93.4] |
| Yes | 7 [4.3] | 11 [10.0] | 18 [6.6] |
Parents alive? | Both parents alive | 128 [78.5] | 91 [82.7] | 219 [80.2] |
| One or both parents dead | 35 [21.5] | 19 [17.3] | 54 [19.8] |
Living arrangement | In campus | 17 [10.4] | 17 [15.4] | 34 [12.5] |
| Outside campus | 146 [89.6] | 93 [84.6] | 239 [87.5] |
Religion | Catholic | 48 [29.5] | 25 [22.8] | 73 [26.7] |
| Protestant or other Christian | 113 [69.3] | 81 [73.6] | 194 [71.1] |
| Muslim | 2 [1.2] | 4 [3.6] | 6 [2.2] |
STI symptoms past 3 months | No | 138 [84.7] | 34 [30.9] | 172 [63.0] |
| Yes | 25 [15.3] | 76 [69.1] | 101 [37.0] |
Perceived chances of getting HIV | Small chance | 135 [82.8] | 95 [86.4] | 230 [84.3] |
| Great chance | 28 [17.2] | 15 [13.6] | 43 [15.7] |
Ever taken PEP and/or PreP | No | 155 [95.1] | 108 [98.2] | 263 [96.3] |
| Yes | 8 [4.9] | 2 [1.8] | 10 [3.7] |
Ever taken part in gambling | No | 39 [23.9] | 91 [82.7] | 130 [47.6] |
| Yes | 124 [76.1] | 19 [17.3] | 143 [52.4] |
Seriously injured past 3 months | No | 139 [85.3] | 99 [90.0] | 238 [87.2] |
| Yes | 24 [14.7] | 11 [10.0] | 35 [12.8] |
Binge eating ever | No | 88 [54.0] | 67 [60.9] | 155 [56.8] |
| Yes | 75 [46.0] | 43 [39.1] | 118 [43.2] |
Anthropometric indicators | | | | |
Body Mass Index [Mean/SD] | | 21.1 [2.3] | 22.1 [3.1] | 21.5 [2.7] |
Body Mass Index categories | Low [< 18.5] | 17 [10.4] | 9 [8.2] | 26 [9.5] |
| Normal [18.5–25] | 136 [83.4] | 81 [73.6] | 217 [79.5] |
| High [> 25] | 10 [6.1] | 20 [18.2] | 30 [11.0] |
Waist-Hip Ratio (WHR [Mean/SD]) | | 0.8 [0.0] | 0.8 [0.0] | 0.8 [0.0] |
Waist-Hip Ratio categories | Low risk | 163 [100.0] | 53 [48.2] | 216 [79.1] |
| High risk | 0 [0.0] | 57 [51.8] | 57 [20.9] |
Mental health indicators | | | | |
Binge drinking past 3 months | No alcohol last 3 months | 70 [42.9] | 76 [69.0] | 146 [53.5] |
| No | 66 [40.5] | 28 [25.5] | 94 [34.4] |
| Yes | 27 [16.6] | 6 [5.5] | 33 [12.1] |
Marijuana use past 3 months | Never used marijuana | 105 [64.4] | 95 [86.4] | 200 [73.3] |
| No | 18 [11.1] | 3 [2.7] | 21 [7.7] |
| Yes | 40 [24.5] | 12 [10.9] | 52 [19.0] |
Tobacco use past 3 months | Never used tobacco | 122 [74.9] | 102 [92.8] | 224 [82.0] |
| No | 21 [12.9] | 4 [3.6] | 25 [9.2] |
| Yes | 20 [12.2] | 4 [3.6] | 24 [8.8] |
Khat use past 3 months | Never used khat | 122 [74.9] | 102 [92.7] | 224 [82.1] |
| No | 16 [9.8] | 3 [2.7] | 19 [6.9] |
| Yes | 25 [15.3] | 5 [4.6] | 30 [11.0] |
Other drug use past 3 months | No | 149 [91.4] | 99 [90.0] | 248 [90.8] |
| Yes | 14 [8.6] | 11 [10.0] | 25 [9.2] |
Disordered Eating behaviour | | | | |
Emotional eating [M/SD] | - | 1.9 [0.6] | 1.9 [0.6] | 1.9 [0.6] |
Restrained eating [M/SD] | - | 2.0 [0.5] | 2.0 [0.6] | 2.0 [0.6] |
External eating [M/SD] | - | 3.0 [0.5] | 3.1 [0.5] | 3.0 [0.5] |
*Used at least one of the following in the past three months: shisha, glue, heroin, cocaine, methamphetamine |
STI: Sexually transmitted Infection |
WHR [Low risk for cardiovascular complications]: <0.95 or < 0.8 for males and females respectively
WHR [High risk for cardiovascular complications]: ≥ 0.95 or ≥ 0.8 for males and females respectively
PEP: Post-exposure prophylaxis
PreP: Pre-exposure prophylaxis