Aim: to obtain a valid and reliable GERD-QOL questionnaire for Indonesian application.
Methods: at the initial stage, the GERD-QOL questionnaire was first translated into Indonesian language and the translated questionnaire was subsequently translated back into the original language (back-to-back translation). The results were evaluated by the researcher team and therefore, an Indonesian version of GERD-QOL questionnaire was developed. Ninety-one patients who had been clinically diagnosed with GERD based on the Montreal criteria were interviewed using the Indonesian version of GERD-QOL questionnaire and the SF 36 questionnaire. The validity was evaluated using a method of construct validity and external validity, and reliability can be tested by the method of internal consistency and test retest. Results: the Indonesian version of GERD-QOL questionnaire had a good internal consistency reliability with a Cronbach Alpha of 0.687–0.842 and a good test retest reliability with an intra-class correlation coefficient of 0.756-0.936; p<0.05). The questionnaire had also been demonstrated to have a good validity with a proven high correlation to each question of SF-36 (p<0.05). Conclusion: the Indonesian version of GERD-QOL questionnaire has been proven valid and reliable to evaluate the quality of life of GERD patients.
Tujuan: mendapatkan kuesioner GERD-QOL yang andal dan sahih untuk digunakan di Indonesia. Metode: sebagai tahap awal, kuesioner GERD-QOL terlebih dahulu diterjemahkan dengan metode back to back translation ke dalam bahasa Indonesia, dan dievaluasi oleh tim peneliti sehingga dihasilkan kuesioner GERD-QOL versi bahasa Indonesia. Sembilan puluh satu orang pasien yang telah didiagnosis GERD secara klinis sebelumnya berdasarkan kriteria Montreal, diwawancarai dengan menggunakan kuesioner GERD-QOL versi Indonesia dan kuesioner SF 36. Kesahihan dinilai menggunakan kesahihan konstruksi dan kesahihan eksternal dan keandalan dinilai melalui metode konsistensi internal dan tes ulang. Hasil: GERD-QOL berbahasa Indonesia memiliki keandalan konsistensi internal kuesioner yang baik (Cronbach alpha: 0.687–0.842) dengan keandalan tes ulang yang baik (intra class correlation coefficient: 0.756-0.936, p<0.05). GERD-QOL juga terbukti memiliki kesahihan yang baik dengan korelasi setiap pertanyaan dengan SF-36 terbukti tinggi (p<0.05). Kesimpulan: GERD-QOL berbahasa Indonesia terbukti sahih dan andal untuk menilai kulitas hidup penderita GERD
