Objectives
Little is known about the age-specific prevalence of hoarding and obsessive compulsive (OC) symptoms, particularly in older age groups. The objectives of this study were to estimate the age-specific prevalence, severity and relationships between hoarding and OC symptoms in males and females using a large population-based sample.
Methods
We assessed the age-specific prevalence rates of hoarding disorder (HD) and obsessive compulsive disorder (OCD) in males and females (at various age ranges between 15–97 years) from the Netherlands Twins Register; n=15,194. Provisional HD and OCD diagnoses were made according to DSM-5 criteria utilizing self-report measures. We also assessed hoarding and OC symptom severity in the various age groups, and explored specific hoarding and OC symptom patterns (e.g., difficulty discarding, excessive acquisition, clutter, checking, washing, perfectionism and obsessions) with age.
Results
Prevalence of provisional HD diagnoses (2.12%) increased linearly by 20% with every 5 years of age (z = 13.8, p < 0.0001) and did not differ between males and females. Provisional OCD diagnoses were most common in younger individuals and in individuals over age 65. Co-occurring OCD increased hoarding symptom severity (coefficient = 4.5, SE = 0.2, 95% CI = 4.1 to 4.9, t=22.0, p<0.0001). Difficulty discarding for HD and checking behaviors for OCD appeared to drive most of the increase in these diagnoses in older ages.
Conclusions
Increased prevalence and severity of HD with age appears to be primarily driven by difficulties with discarding. Increases in OCD prevalence with older age were unexpected, and of potential clinical relevance.