In the United States 3% of people aged over 40 are affected by anosmia. In 2012, smell was assessed in persons aged 40 years and older with rates of anosmia/severe hyposmia was 0.3% at age 40–49 rising to 14.1% at age 80+. Rates of hyposmia was much higher: 3.7% at age 40–49 and 25.9% at 80+.
symptom of Kallmann syndrome
symptom of Empty sella syndrome
symptom of Klinefelter syndrome
symptom of Angelman syndrome
symptom of Laron syndrome
symptom of Rotor syndrome
symptom of Prader–Willi syndrome
symptom of Scheuermann's disease