World Patient Safety Day was observed on 17 September, and this year's theme from the World Health Organization is βSafe care for noncommunicable diseasesβ, with the slogan βSafe care for life!β The theme matters to a very large number of families. Noncommunicable diseases, which include heart disease, cancer, diabetes and chronic lung disease, account for 74 per cent of deaths worldwide, according to WHO. People who live with them rely on health care for years, across many settings, which gives risks of harm many chances to appear. This article explains what WHO says and offers, clearly labelled, some questions families can ask. It is general information, not medical advice.
The numbers behind the theme
WHO's patient safety fact sheet states that around 1 in 10 patients is harmed in health care, and that more than half of that harm is preventable. In primary and ambulatory care, up to 80 per cent of harm can be avoided. In low- and middle-income countries, WHO says, 4 in 100 people die from unsafe care, and more than 3 million deaths a year result from it.
Medicines are a large part of the picture. Medication-related harm affects around 1 in 30 patients, according to WHO, and more than a quarter of it is severe or life-threatening. Medications account for about half of all avoidable harm. Diagnostic errors occur in 5 to 20 per cent of physician-patient encounters, and WHO notes that most people will suffer a diagnostic error in their lifetime. For cancer specifically, the day's campaign page says up to 1 in 3 patients experience adverse events during care.
One in ten patients is harmed. About half of that harm could be prevented.
Why chronic illness raises the stakes
WHO's key messages for this year explain the link. People with noncommunicable diseases face a higher risk of harm because their care is long and complex and often fragmented across doctors, clinics, laboratories and pharmacies. Risks, WHO says, must be addressed across the continuum of care and in daily life, meaning not only inside the hospital but at home, where people manage medicines, diets and symptoms themselves. Strong health systems and a supported workforce are essential. And people living with these diseases βmust be partners in safe careβ.
That last message is the one families can act on. WHO says that engaging patients and families in policy development, research and shared decision-making is essential to safe health systems, and that effective patient engagement can reduce the burden of harm by up to 15 per cent.
Five questions families can ask
A note on what follows. WHO's campaign materials describe principles, and this article has not found a WHO checklist for families. The five questions below are an editorial suggestion, drawn from the areas WHO identifies as sources of harm, such as medicines, diagnosis and fragmented care. They are not medical advice and do not replace instructions from a patient's own doctors.



