Researchers from Frontiers in Pediatrics studied 34 young people aged 12–21 with cystic fibrosis (CF) who were taking Elexacaftor/Tezacaftor/Ivacaftor (ETI), a powerful new medication. The question was simple but important: when a breakthrough treatment improves a teen's physical health, what happens to their emotional wellbeing—and does it affect how well they stick to their treatment plan?
This matters for Singapore families because CF is a genetic condition affecting lung and digestive health, and breakthrough medications like ETI are now available here. Yet little attention has been paid to the mental health side of this medical success story.
Nearly half the teens struggled with depression despite medication working
The findings were striking: 44% of the teenagers screened positive for depression. This wasn't mild sadness—it was clinically significant depression that showed up as persistent low mood, loss of interest in activities, or difficulty concentrating.
While the medication itself worked brilliantly at improving lung function in all teens, those with depression showed a troubling pattern. Their medication possession ratio (a measure of whether they were picking up prescriptions on schedule) dropped from 0.95 to 0.75 over time. Their sweat chloride levels—a key marker showing how well the medication was controlling their CF—also became increasingly unstable. In other words, depression was creating invisible friction in daily treatment routines, even though the physical drug benefits remained strong.
The gap between physical and emotional health in chronic illness
In Singapore and many Asian cultures, medical breakthroughs are celebrated for their physical outcomes. Parents rightfully rejoice when a teen's lung function improves. But this study reveals a blind spot: depression in teens with CF isn't laziness or a character flaw—it's a real medical condition that needs real attention.
The research shows that structured mental health screening should be just as routine as blood tests and lung function checks. The study used the PHQ-9, a simple screening tool that takes minutes to complete and can be done at every clinic visit. Yet this wasn't standard practice for most of the teens studied.
Make mental health screening part of every CF clinic visit
- Ask your teen's CF team to use a depression screening tool like the PHQ-9 at every clinic appointment, not just annually.
- Watch for signs of depression—persistent low mood, sleep changes, withdrawn behaviour—and report these to the medical team as seriously as any physical symptom.
- Consider referral to a mental health professional who understands chronic illness as part of your teen's regular care plan.