Self-diagnosis of active head lice infestation by individuals from an impoverished community: high sensitivity and specificity Auto diagnóstico de pediculose por indivíduos de uma comunidade economicamente desfavorecida: alta sensibilidade e especificidade

To compare sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of self-diagnosis for head lice infestation with visual inspection, we conducted a study in an urban slum in Brazil. Individuals were asked about active head lice infestation (self-diagnosis); we...

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Bibliographic Details
Published in:Revista do Instituto de Medicina Tropical de São Paulo
Main Authors: Daniel Pilger, Adak Khakban, Jorg Heukelbach, Hermann Feldmeier
Format: Article in Journal/Newspaper
Language:English
Published: Universidade de São Paulo (USP) 2008
Subjects:
Head lice
Epidemiology
Diagnosis
Sensitivity
Specificity
Predictive values
Arctic medicine. Tropical medicine
RC955-962
Infectious and parasitic diseases
RC109-216
Alta
Arctic
Online Access:https://doi.org/10.1590/S0036-46652008000200011
https://doaj.org/article/4f0b5fd7aa55488e9f90a676d3dd21ca
Description
Summary:To compare sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of self-diagnosis for head lice infestation with visual inspection, we conducted a study in an urban slum in Brazil. Individuals were asked about active head lice infestation (self-diagnosis); we performed visual inspection and thereafter wet combing (gold standard). Of the 175 individuals included, 77 (44%) had an active head lice infestation. For self-diagnosis, sensitivity (80.5%), specificity (91.8%), PPV (88.6%) and NPV (85.7%) were high. Sensitivity of visual inspection was 35.1%. Public health professionals can use self-diagnosis as a diagnostic tool, to estimate accurately prevalence of pediculosis in a community, and to monitor ongoing intervention strategies. Foi conduzido um estudo em uma favela urbana no Brasil com o objetivo de comparar a sensibilidade, especificidade, valor preditivo positivo (VPP) e valor preditivo negativo (VPN) do auto-diagnóstico de pediculose com a inspeção visual. Dos 175 indivíduos incluídos, 77 (44%) apresentavam pediculose. Para o auto-diagnóstico, a sensibilidade (80.5%), a especificidade (91.8%), o VPP (88.6%) e o VPN (85.7%) foram altos. A sensibilidade da inspeção visual foi 35.1%. Profissionais de saúde podem utilizar o auto-diagnóstico como uma ferramenta diagnóstica para estimar de forma acurada a prevalência de pediculose em uma comunidade, como também para monitorar estratégias de controle da doença.

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