At the University of Gothenburg, Agneta Blomberg has just defended her Ph.D. with findings that could transform how workplaces support their employees' health before crisis hits. Her research reveals something deceptively simple but powerful: changes in work capacity can serve as an early warning system for who is at risk of extended sick leave—and this signal appears before people actually leave work.
The insight matters because workplace mental health research has typically focused on what happens after someone goes on sick leave. Blomberg flipped the question. Instead of studying the aftermath, she and her team asked: what protects the people who stay healthy and working? What can we measure early to intervene before absences happen?
To answer that, they examined data from approximately 8,000 working individuals across Sweden, combining survey responses with official register data. They tracked mental well-being and work capacity over one year, watching who remained in their jobs without extended sick leave. The results were striking. Better mental well-being correlated directly with higher work capacity. But here's what matters most: when researchers used a more detailed metric—one that captures how individuals actually manage their work in relation to their mental state—the link became even clearer and more actionable.
"This type of metric can serve as an early indicator," Blomberg explains in her thesis. "It makes it possible to identify risks before a person goes on sick leave and provides opportunities for early intervention, particularly in the workplace." That shift from reactive to preventive is significant. Workplaces could potentially spot vulnerability not when someone is already suffering enough to take leave, but while there's still time to provide support and make changes.
The research also uncovered a gender-specific pattern that raises new questions. Among women, remaining at work without extended sick leave was more common in two seemingly opposite situations: jobs with low demands and low control, and jobs with high demands and low control. Men showed no corresponding pattern. This doesn't suggest those environments are healthy—quite the opposite. People in high-demand, low-control roles face known risks for stress-related mental ill health. Rather, the finding suggests that women in these conditions may continue working despite elevated stress, which carries its own implications for burnout and eventual collapse.
Blomberg's work sits at an important intersection. Workplaces increasingly recognize that supporting employee mental health makes business sense while being ethically essential. Yet many interventions still arrive too late or address surface symptoms rather than underlying capacity changes. By identifying work capacity as a measurable, modifiable early indicator, her research offers a concrete pathway for prevention—not just treatment.
The study notes its own limitations: the results show associations, not proven cause-and-effect relationships, and rely partly on self-reported information. But the principle holds. If workplaces could systematically track work capacity as a health metric alongside physical wellness programs, they might catch struggling employees during a window when support can genuinely help, before weeks or months away from work become necessary. That's not just good for individuals. It's good for workplaces and for the broader health systems that currently absorb the cost of preventable absences.