Abstract Background Diagnosis of SS is a complex task, as no symptom or test is unique to this syndrome. The American-European Consensus Group (AECG 2002) and the American-European classification criteria of 2016 (ACR/EULAR 2016) emerged through a search for consensus. This study aims to assess the prevalence of Sjögren’s Syndrome (SS) in patients with Systemic Lupus Erythematosus (SLE), according to AECG 2002 and ACR-EULAR 2016 classifications, as well as clinical and histopathological features in this overlap. To date, there is no study that has evaluated SS in SLE, using the two current criteria. Methods This cross-sectional study evaluated 237 SLE patients at the outpatient rheumatology clinic between 2016 and 2018. Patients were submitted to a dryness questionnaire, whole unstimulated salivary flow (WUSF), “Ocular Staining Score” (OSS), Schirmer’s test I (ST-I), and labial salivary gland biopsy (LSGB). Results After verifying inclusion and exclusion criteria, a total of 117 patients were evaluated, with predominance of females (94%) and mixed ethnicity (49.6%). The prevalence of SS was 23% according to AECG 2002 and 35% to ACR- EULAR 2016. Kappa agreement between AECG 2002 and ACR-EULAR 2016 were 0.7 (p < 0.0001). After logistic regression, predictors for SS were: anti/Ro (OR = 17.86, p < 0.05), focal lymphocytic sialadenitis (OR = 3.69, p < 0.05), OSS ≥ 5 (OR = 7.50, p < 0.05), ST I positive (OR = 2.67, p < 0.05), and WUSF ≤ 0.1 mL/min (OR = 4.13, p < 0.05). Conclusion The prevalence of SS in SLE was 23% (AECG 2002) and 35% (ACR-EULAR 2016). The presence of glandular dysfunction, focal lymphocytic sialadenitis, and anti/Ro were predictors of SS in SLE. The greatest advantage of the new ACR-EULAR 2016 criteria is to enable an early diagnosis and identify the overlapping of these two diseases. ACR- EULAR 2016 criteria is not yet validated for secondary SS and this study is a pioneer in investigating prevalence based on the new criteria.

RESUMOObjetivo:Fazer a adaptação transcultural do Eular Sjögren's Syndrome Patient Reported Index (ESSPRI) para a língua portuguesa e avaliar as suas propriedades psicométricas.Método:Estudo transversal de pacientes com síndrome de Sjögren primária (SS). Foram estudadas as propriedades psicométricas (reprodutibilidade intraobservador e a validade de construto). Na validade de construto, o ESSPRI foi comparado com o Patient's Global Assessment (PaGA), Profile of Fatigue and Discomfort (Profad), Sicca Symptoms Inventory (SSI) e Functional Assessment of Chronic Illness Therapy (Facit-fatigue). Os testes estatísticos usados foram o α-Cronbach, coeficiente de correlação intraclasse (CCI), método de Bland-Altman e coeficiente de Spearman. Foi considerado significativo o p ≤ 0,05.Resultados:Não houve diferença entre as versões nas duas línguas e obteve-se, assim, a versão consensual brasileira. Todos os indivíduos foram mulheres de 49,4 ± 11,6 anos, com início dos sintomas de 7,2 ± 5,4 anos e tempo de diagnóstico de 3 ± 3,3 anos. A média do ESSPRI foi de 6,87 ± 1,97. A reprodutibilidade intraobservador foi alta e significativa (0,911) e, no método de Bland-Altman, não houve viés sistemático na concordância das medidas entre as avaliações. Houve correlação moderada do ESSPRI com todos os instrumentos testados.Conclusão:A versão do ESSPRI em português é válida e reprodutível.

ABSTRACTObjective:To carry out the cross-cultural adaptation of EULAR Sjögren's Syndrome Patient Reported Index (ESSPRI) for Portuguese language and evaluate its psychometric properties.Method:Cross-secal study of patients with primary Sjögren's syndrome (SS). The psychometric properties (intraobserver reproducibility and construct validity) were studied. In construct validity, ESSPRI was compared with the Patient's Global Assessment (PGA), Profile of Fatigue and Discomfort (Profad), Sicca Symptoms Inventory (SSI) and Functional Assessment of Chronic Illness Therapy (Facit-F). Statistical tests used were: Cronbach's alpha, intraclass correlation coefficient (ICC), Bland-Altman method and Spearman coefficient. A value of p ≤ 0.05 was considered significant.Results:There was no difference between versions in both languages; thus, a Brazilian consensual version was obtained. All subjects were women aged 49.4 ± 11.6 years, with onset of symptoms of 7.2 ± 5.4 years, and time of diagnosis of 3.0 ± 3.3 years. The mean ESSPRI was 6.87 ± 1.97. The intraobserver reproducibility was high and significant (0.911) and, with Bland-Altman method, there was no systematic bias in the agreement of measures among evaluations. A moderate correlation of ESSPRI with all tested instruments was observed.Conclusion:The Brazilian Portuguese version of ESSPRI is a valid and reproducible version.

Objetivo: Fazer a adaptação transcultural e a validação do Profile of Fatigue and Discomfort – Sicca Symptoms Inventory (short form) (Profad-SSI-SF), questionário que avalia os aspectos subjetivos dos sintomas da síndrome de Sjögren primária (SSp), para a língua portuguesa brasileira. Método: Foi avaliada a equivalência conceitual, de item, semântica e operacional. A versão brasileira do Profad-SSI-SF foi aplicada a 62 mulheres com SSp conforme consenso europeu-americano de 2002 para avaliar a equivalência de mensuração. Foi usado o α-Cronbach para consistência interna; coeficiente de correlação intraclasse (ICC) para reprodutibilidade intraobservador; e coeficiente de correlação de Spearman para validade em comparação com o Patient Global Assessment (PaGA), Eular Sjögren’s Syndrome Patient Reported Index (ESS-PRI), Functional Assessment of Chronic Illness Therapy Fatigue Subscale (Facit-F) e EuroQOL(EQ-5D). Resultados: A consistência interna do Profad, do SSI e da pontuação total foi de 0,80, 0,78 e 0,87, respectivamente. A reprodutibilidade intraobservador do Profad total foi de 0,89; do SSI total de 0,86 e da pontuação total de 0,89. Na validade, o Profad apresentou correlação significativa com o PaGA (r = 0,50), Facit-F (r = 0,59), Esspri (r = 0,58) e todos os domínios do EQ-5D, com exceção da mobilidade. Já o SSI apresentou correlação significativa com o PaGA (r = 0,43), Facit-F (r = 0,57), Esspri (r = 0,55) e a maioria dos domínios do EQ-5D. A pontuação total do Profad-SSI-SF só não obteve correlação estatisticamente significante com o domínio mobilidade e escala 1 a 100 do EQ-D5.

Objective: To perform a cross-cultural adaptation and validation of the Profile of Fatigue and Discomfort – Sicca Symptoms Inventory (short form) (PROFAD-SSI-SF) questionnaire assessing the subjective aspects of the symptoms of primary Sjögren syndrome (pSS), for the Brazilian Portuguese language. Method: Conceptual, of the item, semantic and operational equivalences were evaluated. The Brazilian version of PROFAD-SSI-SF was administered to 62 women with pSS according to the European-American consensus 2002 to assess measurement equivalence. α-Cronbach was used for internal consistency; intraclass correlation coefficient (ICC) for intraobserver reproducibility; and Spearman correlation coefficient for validity by comparing with Patient Global Assessment (PaGA), EULAR Sjögren’s Syndrome Patient Reported Index (ESSPRI), Functional Assessment of Chronic Illness Therapy Fatigue Subscale (FACIT-F) and EuroQOL(EQ-5D). Results: The internal consistency of PROFAD, SSI and total score was 0.80; 0.78; and 0.87, respectively. The intraobserver reproducibility of total PROFAD was 0.89; of total SSI was 0.86; and total score was 0.89. In terms of validity, PROFAD correlated significantly with PaGA (r = 0.50), FACIT-F (r = 0.59), ESSPRI (r = 0.58) and all domains of EQ-5D, with the exception of Mobility. On the other hand, SSI correlated significantly with PaGA (r = 0.43), FACIT-F (r = 0.57), ESSPRI (r = 0.55) and most domains of EQ-5D. The total score of PROFAD-SSI-SF had a nonstatistically significant correlation only with Mobility domain and with 1–100 range of EQ-5D.

INTRODUÇÃO: O EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI) é um índice de atividade sistêmica da síndrome de Sjögren primária (SSP). OBJETIVO: Realizar a adaptação transcultural do ESSDAI para a língua portuguesa. MÉTODO: Estudo transversal com 62 pacientes com SSP de acordo com consenso europeu-americano de 2002. Foram realizadas seis etapas: equivalência conceitual, de item, semântica, operacional, funcional e de mensuração (reprodutibilidade interobservador e a validade de constructo). Para a validade, o ESSDAI foi comparado com a avaliação global do médico (PhGA), o Sjögren's Syndrome Disease Activity Index (SSDAI) e o Sjögren's Systemic Clinical Activity Index (SCAI). Os pacientes foram classificados por um médico especialista conforme a atividade da doença em dois grupos, "ativo" e "inativo", e conforme a intenção de tratar nos grupos "aumento de terapia" e "sem aumento de terapia". O ESSDAI foi testado nesses grupos. Utilizou-se os testes estatísticos: coeficiente de correlação intraclasse (CCI) e método de Bland Altman para a reprodutibilidade; e coeficiente de Spearman (r s) e teste de Mann-Whitney para a validade (P < 0,05 e IC 95%). RESULTADOS: A média do ESSDAI foi de 4,95 ± 6,73. A reprodutibilidade obteve um forte CCI de 0,89 e boa concordância. Na comparação com outros índices, apresentou forte coeficiente de Spearman com o PhGA (r s = 0,83; P < 0,000), moderado com o SSDAI (r s = 0,658 ; P < 0,000) e fraco com o SCAI (r s = 0,411; P = 0,001). O grupo "ativo" e o grupo "com aumento de terapia" obtiveram maiores valores de ESSDAI (P = 0,000). CONCLUSÃO: a versão em português do ESSDAI mostrou ser adaptável, reprodutível e válida para a língua portuguesa.

INTRODUCTION: The EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI) is an index of primary Sjögren's syndrome (PSS) systemic activity. OBJECTIVE: To perform the ESSDAI transcultural adaptation into Brazilian Portuguese. METHOD: This was a cross-sectional study with 62 patients with PSS according to the criteria of the 2002 American-European Consensus. Six stages were conducted: conceptual, item, semantic, operational, functional, and measurement equivalences (interobserver reproducibility and construct validity). For the validity assessment, the ESSDAI was compared with the Physician's Global Assessment (PhGA), the Sjögren's Syndrome Disease Activity Index (SSDAI), and the Sjögren's Systemic Clinical Activity Index (SCAI). Patients were classified by a specialist physician into two groups according to disease activity (active and inactive), and according to the intention-to-treat (increase in therapy and no increase in therapy). The ESSDAI was tested in these groups. The following statistical tests were used: intraclass correlation coefficient (ICC), Bland-Altman plot for reproducibility, and Spearman's correlation coefficient (r s) and Mann-Whitney's test for validity (P < 0.05 and 95% CI). RESULTS: The mean ESSDAI score was 4.95 ± 6.73. The reproducibility obtained a strong ICC of 0.89 and good agreement. When compared with other indices, it showed a strong r s with PhGA (0.83; P < 0.000), a moderate r s with SSDAI (0.658; P < 0.000) and a weak r s with the SCAI (0.411; P = 0.001). The group "active" and the group " increase in therapy" had higher ESSDAI values (P = 0.000). CONCLUSION: The Brazilian Portuguese version of ESSDAI was shown to be adaptable, reproducible, and valid for this language.