The Hidden Cost of Mental-Health Sick Days

In early 2020 Aetna International asked 1,000 office workers in the UK, United States, Singapore and the UAE one deceptively simple question: when do you really stay home from work, and why? The answers expose a stubborn gap between physical and mental health in today’s workplaces. Here are the headline insights you can share with your team – numbers trimmed to the essentials, accuracy intact.

1. We still hide mental–health days

• 35.8 % of all respondents have lied about the real reason for taking a sick day. Among staff already diagnosed with a mental-health condition the figure jumps to 51.7 %.
  
• Stress is both common and taboo: 33.2 % would stay home for stress, yet 47.1 % say they are unlikely to do so, and almost the same share (32.1 %) have disguised stress as something else.
  

Why it matters: presenteeism costs companies more than absenteeism. If employees feel forced to mask burnout, productivity and engagement sink while risk of long-term absence rises.

“When employees feel they have to disguise stress or anxiety, it creates a slow leak in performance and trust,” explains HoorayTeams. “Over time, that pressure adds up often silently.”

2. Presenteeism is highest in the UK, absenteeism in the US

• Nearly a third of the entire sample (29.9 %) took zero sick days in 2019. In the UK that climbs to 41 %.
  
• By contrast, the US records the most extended absences: 18.3 % of American workers logged ten or more days off, versus just 11.7 % in the UK.
  
• Reading the regional tea-leaves: British culture still rewards “toughing it out,” while US employees appear more willing (or forced) to step away when health truly collapses.

3. Physical illness = ‘legitimate’; mental illness = ‘optional’

Respondents are twice as likely to take leave for a physical ailment (66 %) as for a mental-health issue (34 %). 

When asked about specific conditions:

• Sickness & vomiting: almost three quarters would stay home.
  
• Flu: a solid majority – 35.6 % say “very likely” and many more “quite likely.”
  
• Depression: 44.8 % would take leave. Anxiety: just 28 %.

4. Diagnosis unlocks openness – but many go without

Roughly half of all workers (49.7 %) say they have experienced a mental-health issue, yet only 24.2 % have an official diagnosis. The US leads in diagnoses at 39.3 %, while Singapore lags far behind at 6 %. 

Diagnosis matters: 45.4 % of undiagnosed employees feel comfortable discussing mental health with a manager; that rises to 51.7 % when a diagnosis is in place. 

5. Talking to the boss is still easier when it’s a broken bone

Overall, 44.3 % are comfortable raising mental-health concerns with their line manager, compared with 56.2 % for physical problems. 

• Most open: US employees – one quarter (24.7 %) are very comfortable discussing mental health.
  
• Most reserved: Singapore – just 8.5 % hit the same comfort level.

What Employers Should Do Next

1. Treat mental health as real health. Update sick-leave policies so stress, anxiety and depression are explicitly covered. Language alone signals permission to rest and recover.
   
2. Make diagnosis easy. Add or expand access to professional screening and counselling. Where diagnosis rises, openness – and appropriate time off – follow.
   
3. Coach your managers. One in five workers still fears their boss “wouldn’t understand.” Basic mental-health literacy and empathetic check-ins close that trust gap.
   
4. Watch regional culture. If you run global teams, note that UK staff may need explicit encouragement to use their sick days, while US staff may need proactive burnout prevention.

A culture that legitimises mental health, measures real absence patterns and trains frontline managers is no longer a nice-to-have – it is a productivity strategy. Use the data above as a benchmark and start closing your own organisation’s sickness gap today.