The analysis sheds unique light on the childhood predictors of life balance (LB). As indicated above, this outcome has received relatively little attention per se. It is thus unsurprising that there has been barely any research into its childhood predictors, hence the value of our study. In summary, all three of our main hypotheses were supported, often strikingly so. As a reminder, our first was that of the 13 childhood predictors, certain ones will show meaningful associations with LB in adulthood; indeed, every one had a significant association in some country and often pooled across countries. Second, the strength of associations between the predictors and LB will vary by country, reflecting the influence of diverse sociocultural, economic, and health contexts that characterize each nation. Third, the observed associations between the predictors and LB would sometimes be robust against potential unmeasured confounding (as assessed through E-values). Here we shall touch in turn on the predictors, beginning with the one with the strongest impact, namely self-rated health growing up. We discuss this factor in some detail as a way of illustrating the nature and nuances of the data. We then consider the other factors more briefly, referencing and extrapolating the points made in relation to health.
Overall, then, the most impactful factor on average was self-rated health growing up, as assessed on a five-point scale: poor; fair; good; very good; and excellent. Relative to the middle category of “good,” the Risk Ratios (RRs) range from 0.92 for poor (95% CI = 0.87, 0.97) and 0.93 for fair (0.90, 0.95), to 1.07 for very good (1.05, 1.09) to 1.10 for excellent (1.07, 1.13), with all results significant at p < 0.001. An RR can be interpreted as the relative percentage in each category, which in the present paper is calculated in relation to the proportion of people reporting LB. In that respect, although balance was assessed on a four-point scale – never, rarely, often, or always in balance – in our analysis and interpretation we aggregate this into two binary categories, whereby people either have balance (endorsing either “often” or “always”) or do not have it (endorsing either “rarely” or “never”). Thus, taking the RR of 1.10 for excellent health as an example, this means that, compared to people who reported they “only” had good health growing up, the proportion of people with excellent health who have LB is 1.10 times greater than those who do not. Put another way, there is a 10% increase in having LB for those who report excellent health in childhood relative to those who report good health (conditional on all other variables in the model). Another way of interpreting the strength of these results is through the E-value59, which pertains to our third main hypothesis. An E-value measures the strength that an “unmeasured confounder” – a variable not included in the analyses – would need to be to “explain away” the observed relationship.
This finding that childhood health is associated with LB in adulthood is unique: we could find no previous study that has explored such a connection, so simply observing it here is a notable addition to the literature. However, it is worth mentioning up front the caveat that we did not actually assess people’s health in childhood itself, but rather their retrospective recollections about their childhood. Crucially, there are indications that people sometimes change their ratings of childhood health over time; one analysis found nearly one half of their sample revised this during a 10-year observation period62. Older adults who were relatively advantaged (e.g., with socioeconomic resources and better memory) were less likely to revise it, whereas those with multiple childhood health problems were more likely to do so (either positively or negatively); for example, the development of psychological disorders was associated with more negative revised ratings. As such, we must be somewhat cautious in interpreting our data, given we did not measure health in childhood per se, and acknowledge that recall bias might be present. However, for recall bias to completely explain the observed associations of the childhood predictors with adult LB, the effect of adult LB on the retrospective assessments of the childhood predictors would have to be at least as strong as the observed associations themselves63. Moreover, numerous longitudinal studies have actually measured health in childhood then traced its impact on later outcomes, with a substantial literature showing it does have a substantive effect on myriad aspects of adult life. Given that context, it is reasonable to think – based on our data – that LB is indeed one of the variables affected by it. Much of this existing longitudinal work focuses either on physical or mental health or socio-economic status, with poor childhood health having a long-term detrimental health on these outcomes64,65,66,67,68. Given how expansive and all-encompassing the concept of LB is – spanning all domains of existence, as outlined in the introduction – one can see how issues relating to physical and mental health or socio-economic status would be relevant to our outcome of interest specifically.
Let us now turn to our second hypothesis, namely that we would observe regional differences in the effects of the factors. Many of the studies cited above were in a US context, which indeed is characteristic of the psychological literature as a whole, as elucidated in the introduction. Thus, a particular strength of our research is its multinational reach, covering 22 diverse countries. And, as per our second hypothesis, there was indeed considerable variation in the impact of childhood health. The following are the respective RRs for the four health categories (relative to the middle category of “good”) for the 22 countries (with details for each country provided in the Supplementary Tables), together with the 95% CIs in square parentheses: Argentina (poor = 0.90 [0.74, 1.10], fair = 1.97 [0.88, 1.07], very good = 1.04 [0.99, 1.10], excellent = 1.07 [1.01, 1.13]); Australia (0.79 [0.61, 1.03], 0.93 [0.80, 1.09], 1.00 [0.91, 1.09], 1.13 [1.05, 1.23]); Brazil (0.89 [0.75,1.04], 0.88 [0.82,0.95], 1.04 [1.00,1.10], 1.12 [1.07, 1.17]); Egypt (0.95 [0.82, 1.11], 1.00 [0.92, 1.10], 0.98 [0.93, 1.04], 0.99 [0.93, 1.05]); Germany (1.07 [0.92, 1.24], 0.94 [0.86, 1.01], 1.11 [1.07, 1.15], 1.17 [1.12, 1.22]); Hong Kong (0.74 [0.57, 0.95], 0.84 [0.76, 0.93], 1.06 [1.00, 1.12], 1.05 [0.97, 1.14]); India (0.95 [0.83, 1.09], 0.95 [0.88, 1.01], 1.05 [0.99, 1.11], 1.11 [1.03, 1.19]); Indonesia (0.80 [0.54, 1.19], 0.98 [0.92, 1.04], 1.05 [1.00, 1.10], 1.09 [1.03, 1.15]); Israel (1.13 [0.81, 1.57], 0.96 [0.84, 1.09], 1.04 [0.96, 1.12], 1.08 [1.01, 1.16]); Japan (0.71 [0.65, 0.78], 0.83 [0.79, 0.86], 1.11 [1.09, 1.14], 1.14 [1.11, 1.18]); Kenya (0.94 [0.81, 1.11], 0.92 [0.85, 1.00], 1.11 [1.04, 1.18], 1.10 [1.04, 1.17]); Mexico (0.91 [0.77, 1.08], 0.99 [0.93, 1.06], 1.08 [1.03, 1.13], 1.04 [0.99, 1.09]); Nigeria (1.03 [0.85, 1.26], 1.04 [0.93, 1.16], 1.02 [0.96, 1.08], 0.97 [0.91, 1.04]); Philippines (0.99 [0.86, 1.15], 0.93 [0.85, 1.03], 1.06 [0.94, 1.18], 1.13 [1.04, 1.23]); Poland (0.96 [0.72, 1.29], 0.84 [0.73, 0.97], 1.03 [0.98, 1.08], 1.03 [0.97, 1.09]); South Africa (0.99 [0.85,1.16], 0.90 [0.78, 1.03], 1.03 [0.93, 1.13], 1.01 [0.93, 1.10]); Spain (1.12 [0.96, 1.32], 0.94 [0.80, 1.10], 1.03 [0.98, 1.09], 1.08 [1.02, 1.13]); Sweden (0.80 [0.70, 0.90], 0.92 [0.86, 0.98], 1.17 [1.13, 1.21], 1.23 [1.19, 1.27]); Tanzania (0.94 [0.79, 1.12], 1.01 [0.91, 1.12], 1.08 [0.99, 1.18], 1.13 [1.04, 1.23]); Türkiye (0.81 [0.47, 1.40], 1.03 [0.81, 1.30], 1.23 [1.02, 1.47], 1.31 [1.09, 1.56]); United Kingdom (0.95 [0.75, 1.21], 0.79 [0.67, 0.93], 1.13 [1.05, 1.22], 1.15 [1.07, 1.24]); and United States (0.81 [0.62, 1.07], 0.89 [0.78, 1.02], 1.14 [1.08, 1.21], 1.21 [1.15, 1.28]). As one can see, there are many notable regional nuances. For a start, relative to the difference in RR comparing poor and excellent in the pooled meta-analysis, which was 0.19 (0.91 for poor to 1.10 for excellent health), some nations had a smaller range (with Egypt the narrowest, at 0.05), and others larger (with Türkiye the biggest at 0.50). More research is needed to explore why this regional variation exists, but it will almost certainly involve considerations such as the provision of healthcare in the various countries.
There were also intriguing patterns that are harder to explain and certainly merit further investigation, perhaps most strikingly the fact that, in some countries, the RRs seemed “out of order.” One would expect, based on the overall RRs, that relative to people with “good” childhood health, people with worse health (“poor” or “fair”) would have lower levels of LB (RR < 1.00), while people with better health (“very good” or “excellent”) would have higher levels (RR > 1.00). Indeed, eight countries did conform to this linear escalating pattern (Argentina, Australia, Brazil, Hong Kong, Indonesia, Japan, Sweden, and USA). However, in the remaining countries, this pattern was subverted in various ways, where compared to those with good childhood health, some groups with worse health (either poor and/or fair) had higher levels of LB (RR > 1.00), while conversely others with better health (very good and/or excellent) had lower levels (RR < 1.00). In Spain and Israel, for instance, people with poor childhood health had an RR of 1.12 (0.96, 1.32) and 1.13 (0.81, 1.57) respectively: i.e., there, not only does poor childhood health not detract from LB in adulthood, the data suggest it may help, possibly for example by developing resilience. Moreover, the E-values for this particular observation are both 1.50, suggesting these findings are perhaps even moderately robust to potential confounding. We cannot know from our data why this effect is observed, i.e., what is special about these nations where childhood poor health seems to actually facilitate LB in adulthood. One could speculate that, at least in some countries, poor childhood health either encourages or compels people to develop certain psychological qualities that might subsequently be conducive to attaining LB. But this of course begs the question, namely, what is it about these countries that this effect is observed, and why are similar effects not found elsewhere. Certainly, this is something that demands more in-depth study.
Let us now consider the other variables. While we do not have the space to discuss these in comparable depth to childhood health, we can nevertheless highlight some notable patterns that merit further study. Indeed, to reiterate, every factor had a significant effect on balance in adulthood. To begin with, family dynamics are important, including having a good relationship with one’s mother (RR = 1.05; 95% CIs = 1.01, 1.09) and father (1.04; 1.01, 1.06), as is having parents who were married compared to either being divorced (0.97; 0.94, 1.00), single or never married (0.96; 0.92, 1.00), or one or both parents having died during childhood (0.95; 0.92, 0.98). The financial situation of the family also matters: relative to people whose families “got by,” those who “lived comfortably” fared better (1.03; 1.02, 1.05), while people did worse whose families found it either “difficult” (0.96; 0.94, 0.98) or “very difficult” (0.94; 0.91, 0.96). These findings accord with a vast existing literature on the importance of these factors for wellbeing, both in childhood itself and moreover in later life. Thus, for example, with respect to the quality of relationships with parents, a considerable literature on attachment styles shows the positive impact of “secure” bonds – generally regarded as the optimal type of attachment – on mental health later in life69. So too with marriage: research has consistently shown this to be beneficial for children relative to other possibilities such as divorce/separation, both during childhood itself70 and over the life course71, though one notes that in some situations – such as conflicted or abusive marriages – divorce may indeed be better the option all round72. And again, with the financial aspect, research consistently finds that economic security in childhood is associated with better long term mental health prospects73. Until now, however, these factors had not been linked to LB in adulthood, and thus our work extends the literature to encompass this.
Moreover, perhaps of even greater value in this study is the way it highlights regional variation, showing the impact of these factors differs considerably based on socio-cultural dynamics. Thus, the effect of having a good relationship with one’s mother ranged from RR = 0.82 in Egypt (95% CI = 0.71, 0.95) to 1.19 in Spain (1.07,1.33), while the impact of having a good relationship with one’s father ranged from 0.89 in Indonesia (0.77, 1.03) to 1.16 in Poland (1.05,1.28). Likewise, there was considerable variation pertaining to parental marital status, where compared to having parents who were married, the effect of parents: being divorced ranged from 0.85 in Indonesia (0.77, 0.94) to 1.26 in Türkiye (0.95, 1.68); being single or never married ranged from 0.76 in Israel (0.60, 0.95) to 1.21 in India (1.14, 1.29); and one or both parents having died ranged from 0.71 in Türkiye (0.41, 1.24) to 1.18 in Australia (1.00, 1.38). Finally, there was also variation in relation to finances, albeit less so than the other familial dynamics, implying that this factor is somewhat less susceptible to cultural influence. Thus, compared to those whose families “got by” financially, the effect of having “lived comfortably” ranged from 0.97 in India (0.91, 1.03) to 1.11 in Indonesia (1.07, 1.16), while those who found it “difficult” ranged from 0.79 in Türkiye (0.64, 0.98) to 1.04 in India (0.97, 1.11), and those who found it “very difficult” ranged from 0.70 in Türkiye (0.50, 0.98) to 1.04 in Hong Kong (0.86, 1.26). Again, these regional differences are fascinating and deserve further study, and will require in-depth enquiry into cultural dynamics to help explain them and again may perhaps sometimes relate to the potential of adversity to develop resilience. Consider for example the impact of having parents who were single or unmarried, with a 0.45 RR differential between Israel, where such divorce has a markedly negative impact on the likelihood of experiencing LB in adulthood, and India, where it means one is more likely to have LB compared to people whose parents were married. Accounting for such findings will require detailed exploration into the traditions, values and practices pertaining to both marriage and divorce in the respective countries, and likewise in their respective dominant religions (Judaism and Hinduism respectively).
Another important variable is religious attendance at age 12, where not only was this associated with adult LB, but moreover to an increasing degree depending on the frequency of attendance. So, compared to those who never attended, the impact of attending rose from RR = 1.04 for those attending less than once a month (95% CI = 1.02, 1.06), to 1.06 for those attending 1–3 times a month (1.02, 1.09) or weekly (1.03, 1.08). This aligns with an extensive body of work on the positive impact of childhood religious attendance on subsequent physical and mental health74. Again though, our study seems to be the first to link this to LB specifically. And once again, perhaps even more striking is the regional variation, where the impact of attending less than once a month ranged from 0.79 in South Africa (0.64, 0.97) to 1.23 in Kenya (0.95, 1.58), of attending 1–3 times a month ranged from 0.82 in South Africa (0.69, 0.97) to 1.33 in Türkiye (1.10, 1.60), and attending weekly ranged from 0.86 in South Africa (0.74, 1.00) to 1.25 in Kenya (1.02, 1.53). We see here some fascinating patterns that warrant closer investigation. Consider for example the discrepancy between South Africa and Kenya (a gap of 0.44 with regard to attending less than once per month, and 0.39 for weekly attendance). When it comes to research on flourishing, Africa receives very little attention, and even when it does, is rarely considered in granular detail, instead often subject to generalizations about the continent as a whole; yet there is considerable variation within the continent across the myriad aspects of flourishing75, and this is evident in our findings. Strikingly too, however, the two countries are very similar in terms of religious composition, being predominantly Christian to almost the exact same level (85.5% in Kenya and 85.3% in South Africa)76. As such, it would seem that whatever is driving the disparity is most likely not religion per se, but some other factor, which future research can ideally look into.
There is one more set of childhood factors that are impactful for balance in adulthood are adverse experiences, namely, experiencing abuse (RR = 0.93, 95% CI = 0.91, 0.95) and being an outsider growing up (0.90; 0.87, 0.92). These of course connect with a now vast literature on the long-term detrimental impact of Adverse Childhood Experiences, which are documented to negatively impact a panoply of outcomes later in life, ranging from substance use77 and food insecurity78 to depression79 and even frailty in older adults80. Thus, to this literature we can also add that such adversities also lower the likelihood of experiencing LB as an adult. Again though, the regional variation is considerable, where the impact of abuse ranges from 0.83 in Poland (0.74, 0.94) to 1.01 in India (0.94, 1.08), while the impact of being an outsider ranges from 0.76 in Australia (0.69, 0.84) to 1.06 in Turkiye (0.86, 1.31). Here with only perhaps slight exceptions, the effects seem more uniform across countries.
Finally, there are three factors that are not necessarily about childhood per se, but are nevertheless relevant to childhood, namely, people’s age, sex, and immigration status. In one sense of course, these are childhood factors (in that they tell us something about people’s childhood), but from another perspective they are factors that pertain to the individual at all life stages. Nevertheless, they are worth briefly noting here. Regarding age, the older the participants, the more likely they are to have LB: compared to people aged 18–24 (i.e., born between 1998 and 2005), the RRs rose from a marginally higher 1.01 (95% CI = 0.99, 1.04) for those aged 25–29 (1993–1998), to 1.12 (1.05, 1.19) for those aged 70–79 (1943–1953), although it dropped considerably to just 0.53 (0.13, 2.18) for those aged over 80 (born in 1943 or earlier), though this latter group was very small, so caution is required in interpreting this data (as indicated by the massive 95% CI of 2.05). These findings could be regarded as reflecting a childhood factor, especially if we interpret the data as being about the time period when people were born, hence being a cohort effect. However, the emergent literature on LB suggests it tends to increase as a function of age1. As such, it is perhaps more realistic to interpret the findings here as simply being more about the actual current age of the participants. Nevertheless, it is again still interesting to note regional variation, where the RR of the 70–79 age group ranged from 0.79 in Nigeria (0.62, 1.02) to 1.51 in Australia (1.31, 1.74), showing the relationship between age and life balance is not universally observed, and like the other factors here is affected by socio-cultural dynamics.
The penultimate variable is sex, which ranked second last in terms of impact, where compared to men, women had an RR of 0.98 (95% CI = 0.96, 1.00). That said, we should note a very small percentage of the sample stated their gender was neither male nor female but “other”, with this group having considerably lower LB (0.25; 0.04, 1.37). We do need to be cautious in interpreting this finding, as this group was very small (< 0.1% of the observed sample) in several countries, leading to complete separation and large uncertainty in this estimate. Nevertheless, it is a strikingly low RR that does demand further study. There is by now an extensive literature showing that people who identify as LGBTQ + tend to have lower levels of mental health across the lifespan, from youth81 to older adults82. It is perhaps unsurprising that this factor then would also affect LB. It is not certain whether the data here constitutes a childhood factor per se, since the item asks people their current gender, not their gender as a child, and it is possible that some percentage who answered “other” now would not have done so in childhood. That said, even if the latter were the case, it is likely that some relevant dynamics would have manifested during childhood (e.g., some sense of gender dysphoria). Thus, more research will be needed to look into this finding. Also, as with other factors, it will also be important to investigate the regional variation, where the RR for females ranged from 0.87 in Kenya (0.84, 0.91) the Philippines (0.82, 0.93) to 1.08 in Japan (1.06, 1.10), and for those answering “other” ranging from 0.28 in Germany (0.07, 1.08) to 1.43 in Mexico (1.25, 1.64) and Nigeria (1.32, 1.54). It would be helpful to know, for instance, what it is about Mexico and Nigeria that means people who answer “other” tend to be much more likely to have life balance than men or women. Perhaps one possibility is that both have long-standing traditional non-binary roles in some of their cultures – including the Muxes in Mexico83 and the ‘Yan Daudu in Nigeria84 – which may be driving at least some of the differences in the data here.
Lastly, the factor with the least impact was immigration status: compared to people born in the country in which they live, those born elsewhere had a RR that was basically equal (1.01; 95% CI = 0.97, 1.05). As with age and sex, this is not necessarily a childhood factor, since it reflects a person’s current immigrant status, not that of when they were a child, though it does indicate that as a child they were born in a country other than the one in which they currently live. Nevertheless, it is still intriguing to note that such status does not seem to have any bearing on LB, which is notable, given that being an immigrant is frequently perceived as presenting challenges that can be detrimental to mental health85. That said, research has often found immigrant mental health is “better than expected”86, and may even be better than native people, a phenomenon remarked on often enough to have a label – namely, the “healthy immigrant effect” – which “suggests that immigrants have a health advantage over the domestic-born,” though this usually “vanishes with increased length of residency”87. In our case, while we didn’t observe this kind of effect, neither were immigrants disadvantaged when it comes to LB. Again though, there were also significant regional disparities, with RR ranging from 0.81 in the Philippines (1.33, 2.00) to 1.45 in Tanzania (0.96, 2.19), so in some countries at least the healthy immigrant effect may play out but the confidence intervals are quite wide.