Some details regarding the patients studied by Moberg et al. R4715510CEBBHDBG were absent. They studied more elderly female than elderly male patients; however, the gender distribution in the younger patients and comparison subjects is unknown. This unequal distribution may account for the lack of a main effect for gender in performance on the smell identification test. This negative finding contrasts with the authors’ previous reports of gender effects in normal subjects R4715510CEBDEAAH and our findings in patients with schizophrenia R4715510CEBBBGEA, R4715510CEBCIHEI. Specifically, sex differences in olfactory function are age related in patients with schizophrenia. In younger men with schizophrenia, olfactory identification deficits are common; in older patients, both men and women are impaired. It would have been informative to determine whether an age (young versus elderly)-by-gender-by-diagnosis interaction existed. In the absence of a significant three-way interaction, the age-by-diagnosis interaction (also not reported) provides the most direct test of selective olfactory decline in patients.