Utilidad de las concentraciones séricas de adalimumab como predictores de adherencia al tratamiento / Clinical utility of serum concentrations of adalimumab as predictor of treatment adherence

OBJETIVO: Evaluar la utilidad de la determinación de concentraciones séricas (Cs) de adalimumab (ADA) como factor predictor de la adherencia al fármaco medida a través de la tasa de posesión de medicación (TPM) y del test de Morisky Green (MG) en pacientes con enfermedades crónicas inflamatorias. MATERIAL Y MÉTODO: Diseño prospectivo, descriptivo de cohortes. CRITERIOS DE INCLUSIÓN: pacientes adultos con artropatías inflamatorias (AI) o enfermedad inflamatoria intestinal (EII) en tratamiento con ADA. Criterios de exclusión: pacientes con anticuerpos anti-ADA. VARIABLES: sexo, edad, diagnóstico, pauta posológica, Cs (μg/ml), TPM (TPM ≥ 80% adherentes), y resultado del test de MG (no adherente o adherente). El análisis estadístico se realizó mediante STATA v13.0. RESULTADOS: Cuarenta y cinco pacientes (23 mujeres) con edad de 52,22 (14,39) años, 17 EII (37,78%), 26 AI (57,78%) y 2 con ambas enfermedades (4,44%) tratados con ADA cada 14 días (42/45,93,33%) o cada 7 días (3/45;6,67%). Se detectaron Cs infraterapéuticas en el 22,22% pacientes (10/45): el 10% (1/10) se clasifican como no adherentes y el 90% (9/10) como adherentes según MG y TPM. La Cs con la TPM, así como los métodos indirectos entre sí (TPM y MG) presentaron un índice de acuerdo débil, siendo la asociación ligeramente superior al relacionar los métodos indirectos entre sí (0,244 vs. 0,378). CONCLUSIÓN: La determinación de Cs de ADA presenta, por sí sola, una utilidad limitada en la detección de pacientes no adherentes

OBJECTIVE: to evaluate the usefulness of serum concentrations (Sc) of adalimumab (ADA) as a predictor of medication adherence using the medication possession ratio (MPR) and Morisky Green test (MGT) in patients with chronic inflammatory diseases. MATERIAL AND METHOD: Design a prospective descriptive cohort study. Inclusion criteria: adult patients diagnosed with inflammatory arthropathy (IA) or inflammatory bowel disease (IBD) treated with ADA. Exclusion criteria: positive anti-adalimumab antibody. VARIABLES: sex, age, diagnosis, dosage regimen, Sc (mg/mL), MPR (MPR ≥ 80% adherent) and MGT (non-adherent or adherent). Statistical analysis was performed using STATA v13.0. RESULTS: Forty-five patients (23 women) with an age of 52.22 (14.39) years, 17 IBD (37.78%), 26 IA (57.78%) and 2 with both conditions (4.44%) treated with 40mg ADA every 14 days (42/45; 93.33%) or every 7 days (3/45; 6.67%). We detected subtherapeutic Sc in 22.22% of patients (10/45); 10% (1/10) were classified as non-adherent and 90% (9/10) as adherent according to MGT and MPR. The quantification of Sc shows weak agreement with MPR, as was the case with the indirect methods of each (MPR and MGT). The association was slightly greater when the indirect methods were compared to each other (0.244 vs. 0.378). CONCLUSION: the determination of Sc of ADA alone has limited utility in the detection of non-adherent patients

Clinical utility of serum concentrations of adalimumab as predictor of treatment adherence. / Utilidad de las concentraciones séricas de adalimumab como predictores de adherencia al tratamiento.

OBJECTIVE: to evaluate the usefulness of serum concentrations (Sc) of adalimumab (ADA) as a predictor of medication adherence using the medication possession ratio (MPR) and Morisky Green test (MGT) in patients with chronic inflammatory diseases. MATERIAL AND METHOD: Design a prospective descriptive cohort study. INCLUSION CRITERIA: adult patients diagnosed with inflammatory arthropathy (IA) or inflammatory bowel disease (IBD) treated with ADA. EXCLUSION CRITERIA: positive anti-adalimumab antibody. VARIABLES: sex, age, diagnosis, dosage regimen, Sc (mg/mL), MPR (MPR ≥ 80% adherent) and MGT (non-adherent or adherent). Statistical analysis was performed using STATA v13.0. RESULTS: Forty-five patients (23 women) with an age of 52.22 (14.39) years, 17 IBD (37.78%), 26 IA (57.78%) and 2 with both conditions (4.44%) treated with 40mg ADA every 14 days (42/45; 93.33%) or every 7 days (3/45; 6.67%). We detected subtherapeutic Sc in 22.22% of patients (10/45); 10% (1/10) were classified as non-adherent and 90% (9/10) as adherent according to MGT and MPR. The quantification of Sc shows weak agreement with MPR, as was the case with the indirect methods of each (MPR and MGT). The association was slightly greater when the indirect methods were compared to each other (0.244 vs. 0.378). CONCLUSION: the determination of Sc of ADA alone has limited utility in the detection of non-adherent patients.