6.2% of people over 55 years old show hoarding behavior.
"from 2.3% in the youngest, to 6.2% in the oldest, age groups; the odds of hoarding was nearly three times as great in the oldest compared to the youngest age group. In addition, the prevalence of hoarding was over two times as great in men (5.6%) compared to women (2.6%). The prevalence of hoarding was about two times as great in those who were widowed compared to those who were currently married, and two times as great in the currently unemployed compared to the employed, although the differences were not statistically significant at p<0.05. The prevalence of hoarding was not substantially different by education, living arrangement (i.e., lives alone or with others), or race/ethnicity."
Read the full study in:
National Center for Biotechnology Information
US National Library of Medicine
National Institutes of Health
Authors: Jack F. Samuels, O. Joseph Bienvenu, Marcos A. Grados, Bernadette Cullen, Mark A. Riddle, Kung-yee Liang, William W. Eaton, and Gerald nestadt