ABSTRACT
PURPOSE: To compare sensitivity and specificity of achromatic perimetry with size I stimulus (WW-I) with standard automated perimetry (SITA strategy) and blue on yellow perimetry (SWAP) for early diagnosis of glaucoma. METHODS: Seventy-three eyes of 73 suspects, glaucomatous and normal subjects underwent automated perimetry with SITA 24-2, WW-I and SWAP. After application of specific criteria of abnormality, sensitivity, specificity, and the area under ROC (Receiver Operating Characteristic) curve were calculated for each of the examinations. The areas under the ROC curve were compared pair-wisely with the univariable Z test and significance set at 5%. RESULTS: WW-I displayed the greatest sensitivity (100%) and the lowest specificity (75.7%). SWAP revealed less sensitivity (69.4%); specificity, however, was higher (89.2%). Pairwise comparison of ROC curves showed no difference. CONCLUSION: WW-I revealed good sensitivity for the detection of early glaucomatous visual field defects. This technique adds to the available armamentarium for early functional diagnosis of glaucomatous optic neuropathy.
Subject(s)
Glaucoma/diagnosis , Visual Field Tests/methods , Visual Fields , Adult , Case-Control Studies , Early Diagnosis , Female , Humans , Male , Middle Aged , ROC Curve , Sensitivity and SpecificityABSTRACT
OBJETIVO: Comparar a sensibilidade e especificidade da perimetria acromática com estímulo de tamanho I (BB-I) com a perimetria acromática convencional (estratégia SITA) e a perimetria azul-amarelo (SWAP) para o diagnóstico precoce do glaucoma. MÉTODOS: Setenta e três olhos de 73 pacientes suspeitos, glaucomatosos e normais foram submetidos às perimetrias SITA 24-2, BB-I e SWAP. Após aplicação de critérios específicos de anormalidade para interpretação dos resultados, calculou-se a sensibilidade, a especificidade e a área sob a curva ROC (Receiver Operating Characteristic) para cada um dos exames. As áreas sob as curvas ROC foram comparadas aos pares com o teste Z univariável e significância 5 por cento. RESULTADOS: O BB-I demonstrou maior sensibilidade (100 por cento) e menor especificidade (75,7 por cento). O SWAP revelou menor sensibilidade (69,4 por cento), porém maior especificidade (89,2 por cento). A comparação pareada entre as curvas ROC não revelou diferença estatisticamente significante entre as três técnicas perimétricas estudadas. CONCLUSÕES: O BB-I revelou-se eficaz na detecção de defeitos precoces de campo visual no glaucoma. Esta técnica soma-se ao armamentário semiológico disponível para o diagnóstico funcional precoce da neuropatia óptica glaucomatosa.
PURPOSE: To compare sensitivity and specificity of achromatic perimetry with size I stimulus (WW-I) with standard automated perimetry (SITA strategy) and blue on yellow perimetry (SWAP) for early diagnosis of glaucoma. METHODS: Seventy-three eyes of 73 suspects, glaucomatous and normal subjects underwent automated perimetry with SITA 24-2, WW-I and SWAP. After application of specific criteria of abnormality, sensitivity, specificity, and the area under ROC (Receiver Operating Characteristic) curve were calculated for each of the examinations. The areas under the ROC curve were compared pair-wisely with the univariable Z test and significance set at 5 percent. RESULTS: WW-I displayed the greatest sensitivity (100 percent) and the lowest specificity (75.7 percent). SWAP revealed less sensitivity (69.4 percent); specificity, however, was higher (89.2 percent). Pairwise comparison of ROC curves showed no difference. CONCLUSION: WW-I revealed good sensitivity for the detection of early glaucomatous visual field defects. This technique adds to the available armamentarium for early functional diagnosis of glaucomatous optic neuropathy.
