This study was carried out to determine whether slow nail growth is a predisposing factor for onychomycosis or if onychomycosis results in slow nail growth. Forty-nine patients with unilateral onychomycosis of the great toenail were enrolled and classified in two groups according to the size of affected area, i.e. more than half or less than half of the toenail. The growth rates of affected and unaffected great toenails of all patients were measured. Before a normal appearance was reached, the growth rates of affected great toenails, when the affected area occupied more than half of total nail plate, was slower than that of the unaffected great toenails. After a normal appearance was achieved, there were no differences in growth rates between affected and unaffected great toenails. Therefore, this study of patients with unilateral toenail onychomycosis did not support the hypothesis that slow nail growth rate is a predisposing factor for onychomycosis.
Reduced food intake ability can restrict an individual's choice of foods and might have a significant impact on the individual's quality of life and mental health. The aim of this study was to evaluate the correlations between self-reported masticatory ability and oral health-related quality of life (OHRQOL) and psychological health. The study included 72 (26 men, 46 women) adults with a mean age of 26·4 ± 8·6 years. Each participant completed the key subjective food intake ability (KFIA) test for five key foods, the Korean version of the Oral Health Impact Profile-14 (OHIP-14K) and three questionnaires for measuring anxiety, depression and self-esteem. The participants were distributed into two groups by sex (a mean age of 23·9 ± 5·2 for men and 27·9 ± 9·8 for women) and by the median KFIA score. There were no significant differences in any of the variables according to sex. Thirty-two participants (12 men, 20 women) in the lower KFIA group had a higher total OHIP-14K (P < 0·001) and depression level (P < 0·05) than the 40 participants (14 men, 26 women) in the higher KFIA group. As the KFIA decreased, OHRQOL worsened (P < 0·001) and depression increased (P < 0·05). Participants with lower KFIA scores were more than 4·3 times as likely as to have a poor OHRQOL than the reference group (odds ratio, 4·348; 95% confidence interval, 1·554-12·170, P < 0·01). Lower subjective food intake ability is associated with a poor oral health-related quality of life and higher depression level.
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