The Prevalence of Specific Phobia by Age in an Italian Nationwide Survey: How Much Does it Affect the Quality of Life?
Federica Sancassiani1, *, Ferdinando Romano2, Matteo Balestrieri3, Filippo Caraci4, 5, Guido Di Sciascio6, Filippo Drago4, Maria Carolina Hardoy1, Maria Francesca Moro1, 7, Rita Roncone8, Martina Piras1, Antonio Preti1, Liliana Dell’Osso9, Carlo Faravelli10, Mauro Giovanni Carta1
The study aimed to see if a community survey conducted by clinical interviewers with semi-structured psychiatric interviews shows lifetime prevalence rates of Specific Phobia (SP) similar to those found by surveys carried out by lay interviewers and if the high level of impairment found in SP may be confirmed.
This is a community survey on an Italian nationwide sample randomly selected from registers of municipalities. Tools: semi-structured ANTAS psychiatric interview derived from the SCID-DSM-IV, was carried out by clinicians (psychologists or physicians); Short Form Health Survey (SF-12) was conducted as a measure of quality of life (QoL). Analyses: means of the χ2 test odds ratios were adopted to test several associations regarding SP prevalence. One-way ANOVA was used to compare different groups on attributable burden due to SP and/or other disorders in worsening QoL.
The lifetime prevalence of SP was 2.3%. No difference was found by age class. Females showed more than twice the frequency of males (p<0.0001). The disorders showing the closest association with SP were: social phobia (OR=17.53); general anxiety disorder (OR=11.57); anorexia (OR=11.13) and agoraphobia (OR=10.03), but also obsessive compulsive disorders (OR=8.8), eating disorders (OR=7.2), panic disorder (OR=5.9), post-traumatic stress disorder (OR=5.8), and major depressive disorder (OR=4.8) presented an association that achieved statistical significance. The QoL of people with SP and at least one disorder of anxiety, mood or eating in comorbidity, measured as a score at SF12, was worse than controls without SP (p <0.001) but of people with SP without co-morbidity, the finding was opposite (p = 0.809).
An epidemiological study conducted by clinical interviewers through semi-structured interviews appears to re-dimension the impact of SP, at least from the public health perspective. Future prospective studies will better clarify the role of SP in the context of anxiety disorders.
Correspondence: Address correspondence to this author at the DDepartment of Medical Sciences and Public Health, University of Cagliari, Italy; Tel: +39 3493119215; E-mail: firstname.lastname@example.org