Schizophrenia and smoking: impact on negative symptoms
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Resumen
Antecedentes: se ha planteado la hipótesis de que los pacientes con esquizofrenia emplean la nicotina para reducir los síntomas negativos de su enfermedad y para mejorar su función cognitiva; sin embargo, no existe evidencia concluyente en la literatura sobre el vínculo entre el consumo de nicotina y la disminución de los síntomas negativos de la enfermedad.
Objetivo: investigar los efectos de la nicotina en la expresión de síntomas negativos en pacientes con esquizofrenia, tanto fumadores como no fumadores. Método: se realizó un estudio transversal con 100 pacientes diagnosticados con esquizofrenia (54 fumadores y 46 no fumadores) en el Hospital Psiquiátrico de la Cruz, en Líbano, entre abril y agosto de 2016. Se utilizaron los instrumentos CDSS, PANSS y FTND para evaluar parámetros clínicos. Se emplearon las pruebas t de Student, ANOVA y chi-cuadrada para las comparaciones.
Resultados: la edad media de los fumadores fue de 47.16 años (SD = 7.14) y la de los no fumadores de 47.02 años (SD = 7.9). 69.8% de los fumadores y 45.7% de los no fumadores fueron hombres. La alta dependencia de la nicotina se relacionó con la disminución de síntomas negativos evaluados con el PANSS entre los dos grupos (p < .001); no se encontraron diferencias significativas ni en los síntomas positivos ni con los cognitivos (p > .05 para ambas variables).
Discusión y conclusiones: este estudio es el primero en investigar la relación entre la expresión de los síntomas negativos y el tabaquismo en pacientes con esquizofrenia en Líbano. El tabaquismo es un proceso complejo que involucra aspectos psicopatológicos, bioquímicos y neurofarmacológicos; las tasas de tabaquismo son considerablemente altas entre pacientes con esquizofrenia, por lo que son necesarios más estudios para reconocer estos hallazgos y sus bases.
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