The research team, led by Ana H. Alarcón Aguilar and colleagues, framed their work around a growing international consensus that well-being is not a luxury but a core component of health. Since the World Health Organization defined health in 1948 as a state of complete physical, mental and social well-being, researchers have accumulated evidence that people with high well-being live longer, recover faster and develop fewer chronic conditions. Meta-analyses have linked positive psychological states to lower cardiovascular risk, slower illness progression and reduced mortality, making well-being both an outcome worth studying and a potential lever for public health policy. In an era when governments are scrambling to cope with ageing populations, understanding what sustains mental health in old age has become a strategic priority enshrined in the United Nations 2030 Agenda.

Spain presents a particularly urgent case. People over 65 currently make up 20.1 percent of the Spanish population, a share projected to climb to roughly 30.4 percent by around 2050. Data from the European Quality of Life Survey, which has tracked well-being across the continent since 2003 using the same instrument employed in the new study, show that Spanish well-being declines with age, and that older Spanish adults score lower than their Nordic counterparts while resembling the pattern seen across the Mediterranean and Balkan regions. Within Spain, women consistently report lower mental well-being than men, a gap the new study reproduces in detail.

The participants, all residents of Castelló de la Plana, completed a battery of validated questionnaires administered by three experienced psychologists over two weeks. Psychological well-being was measured with the WHO-5 Well-Being Index, a five-item scale asking how often over the previous two weeks respondents felt cheerful and in good spirits, calm and relaxed, active and vigorous, fresh and rested on waking, and that daily life was filled with interesting things. Raw scores from zero to 25 are multiplied by four to yield a percentage, with scores below 50 traditionally flagged as a screening threshold for depression. Life satisfaction was assessed with Diener’s Satisfaction with Life Scale, loneliness with the six-item Spanish version of the De Jong Gierveld Loneliness Scale, and physical health with the physical health dimension of the WHOQOL-BREF quality-of-life instrument, covering daily activities, energy, mobility, pain, sleep and work capacity.

The headline result was a mean WHO-5 score of 60.21, with a standard deviation of 18.80, indicating moderate overall well-being but with substantial individual variation. Women averaged 57.66 while men averaged 64.42, a statistically significant difference. All instruments showed satisfactory internal consistency, with Cronbach’s alpha values ranging from 0.70 for loneliness to 0.81 for life satisfaction, giving the team confidence that the scales were measuring stable, coherent constructs in this older Spanish sample.

The analytical centerpiece was a hierarchical multiple linear regression, a technique that enters blocks of predictor variables in sequence to reveal how much explanatory power each adds. The first block contained sociodemographic variables: gender, age, living alone, marital status, education and employment. It explained less than three percent of the variance in well-being. Adding life satisfaction raised the explained variance to 35 percent. Physical health pushed it to 47 percent, and loneliness completed the model at 49 percent. The final model was highly significant, with an F-statistic of 22.56 and a statistical power of 1.00, and diagnostic checks confirmed the assumptions of homoscedasticity, normally distributed residuals and independent errors, with a Durbin-Watson statistic of 1.94.

Four predictors emerged as significant in the final model. Being male was associated with higher well-being, with a coefficient of minus 4.86 for the female category. Each additional point of life satisfaction added 2.04 points of well-being, and each point of better perceived physical health added 1.67. Loneliness worked in the opposite direction, subtracting 1.87 points per unit of perceived loneliness. Notably, age, living alone, marital status, educational level and employment status all failed to reach significance, a pattern the authors link to prior international work by Geerling and Diener showing that demographic predictors exert small or very small effects on older people’s well-being compared with psychosocial factors such as perceived social support.

The gender gap deserves particular attention. The authors note that women’s lower well-being is consistent with European survey data and with literature showing that women report more depressive symptoms, a condition strongly and negatively correlated with well-being. Yet they also raise a methodological caveat: men may systematically underreport depressive symptoms because of social desirability bias, meaning the true gender difference could be either real or inflated by measurement artifacts. Either way, the study argues that older women should be a priority target for well-being interventions, especially those with lower educational attainment, who previous research identifies as being at elevated risk.

The study’s limitations temper its conclusions but do not undermine its central message. The cross-sectional design captures associations, not causal arrows, and the authors emphasize that the relationships between loneliness, health, life satisfaction and well-being are likely bidirectional: lonely people become less healthy, and less healthy people become lonelier. The convenience sample, recruited by approaching people over 55 in the streets of Castelló, was predominantly female, retired and highly educated, limiting generalizability to Spain’s older population as a whole. The authors also flag the absence of income, frailty, self-perceptions of ageing and self-compassion from the model, all of which prior studies suggest could add explanatory power, and they call for longitudinal designs and probability sampling in future work.

What the study loses in causal certainty it gains in practical direction. Because life satisfaction, physical health and loneliness are all modifiable, they are actionable targets in a way that age and gender are not. The authors point to community-based programmes that strengthen intergenerational ties, adapted physical activity initiatives that improve both mobility and mood, and digital literacy training that helps older adults maintain meaningful online connections. Interventions built on self-compassion and positive self-perceptions of ageing have also been shown to reduce depressive symptoms and may even protect against cognitive decline. With Spain’s over-65 population swelling toward nearly a third of the country, and with the study’s well-being means slightly below the European survey benchmarks of 63 in 2016 and 65.4 in 2012, the message for policymakers is clear: the cheapest and most effective investments in healthy ageing may lie not in demographics but in connection, health and the way older people evaluate their own lives.

Subject of Research: Predictors of psychological well-being among Spanish older adults, including loneliness, physical health, life satisfaction and gender

Article Title: Psychological Well-Being in Spanish Older Adults

Article References: Aguilar, A. H. A., Hornero, A. C., Riera, A. J. L., Hidalgo, M. R., & Miedes, A. C. (2026). Psychological Well-Being in Spanish Older Adults. Trends in Psychology. https://doi.org/10.1007/s43076-026-00521-y

Image Credits: AI Generated

DOI: 10.1007/s43076-026-00521-y

Keywords: psychological well-being, older adults, loneliness, life satisfaction, physical health, WHO-5, ageing, Spain, gender differences, hierarchical regression, mental health, healthy ageing