References
- Jaspersen D, Kulig M, Labenz J, Leodolter A, Lind T, Meyer-Sabellek W, Prevalence of extra-oesophageal manifestations in gastro-oesophageal reflux disease: an analysis based on the ProGERD Study. Aliment Pharmacol Ther 2003;17:1515–20.
- Vakil N, van Zanten SV, Kahrilas P, Dent J, Jones R. The Montreal definition and classification of gastroesophageal reflux disease: a global evidence-based consensus. Am J Gastroenterol 2006;101:1900–20; quiz 1943.
- Jaspersen D, Labenz J, Willich SN, Kulig M, Nocon M, Leodolter A, Long-term clinical course of extra-oesophageal manifestations in patients with gastro-oesophageal reflux disease. A prospective follow-up analysis based on the ProGERD study. Dig Liver Dis 2006;38:233–8.
- Andersson O, Moller RY, Finizia C, Ruth M. A more than 10-year prospective, follow-up study of esophageal and pharyngeal acid exposure, symptoms and laryngeal findings in healthy, asymptomatic volunteers. Scand J Gastroenterol 2009;44:23–31.
- Branski RC, Bhattacharyya N, Shapiro J. The reliability of the assessment of endoscopic laryngeal findings associated with laryngopharyngeal reflux disease. Laryngoscope 2002;112:1019–24.
- Noordzij JP, Khidr A, Desper E, Meek RB, Reibel JF, Levine PA. Correlation of pH probe-measured laryngopharyngeal reflux with symptoms and signs of reflux laryngitis. Laryngoscope 2002;112:2192–5.
- Ylitalo R, Lindestad PA, Ramel S. Symptoms, laryngeal findings, and 24-hour pH monitoring in patients with suspected gastroesophago-pharyngeal reflux. Laryngoscope 2001;111:1735–41.
- Qadeer MA, Phillips CO, Lopez AR, Steward DL, Noordzij JP, Wo JM, Proton pump inhibitor therapy for suspected GERD-related chronic laryngitis: a meta-analysis of randomized controlled trials. Am J Gastroenterol 2006;101:2646–54.
- Belafsky PC, Postma GN, Koufman JA. Validity and reliability of the reflux symptom index (RSI). J Voice 2002;16:274–7.
- Dauer E, Thompson D, Zinsmeister AR, Dierkhising R, Harris A, Zais T, Supraesophageal reflux: validation of a symptom questionnaire. Otolaryngol Head Neck Surg 2006;134:73–80.
- Carrau RL, Khidr A, Gold KF, Crawley JA, Hillson EM, Koufman JA, Validation of a quality-of-life instrument for laryngopharyngeal reflux. Arch Otolaryngol Head Neck Surg 2005;131:315–20.
- Andersson O, Rydén A, Ruth M, Ylitalo R, Finizia C. Validation of the Swedish translation of LPR-HRQL. Unpublished work, 2009.
- Taft C, Karlsson J, Sullivan M. Performance of the Swedish SF-36 version 2.0. Qual Life Res 2004;13:251–6.
- Ware JE, Jr., Gandek B. Overview of the SF-36 Health Survey and the International Quality of Life Assessment (IQOLA) Project. J Clin Epidemiol 1998;51:903–12.
- Nunally J, Bernstein I. Psychometric theory. New York: McGraw Hill; 1994.
- Cronbach LJ. Coefficient alpha and the internal structure of tests. Psychometrika 1951;16:297–334.
- Koufman JA. The otolaryngologic manifestations of gastroesophageal reflux disease (GERD): a clinical investigation of 225 patients using ambulatory 24-hour pH monitoring and an experimental investigation of the role of acid and pepsin in the development of laryngeal injury. Laryngoscope 1991;101(4 Pt 2 Suppl 53):1–78.
- Eryuksel E, Dogan M, Golabi P, Sehitoglu MA, Celikel T. Treatment of laryngopharyngeal reflux improves asthma symptoms in asthmatics. J Asthma 2006;43:539–42.
- Carrau RL, Khidr A, Crawley JA, Hillson EM, Davis JK, Pashos CL. The impact of laryngopharyngeal reflux on patient-reported quality of life. Laryngoscope 2004;114:670–4.
- Patrick DL, Chiang YP. Measurement of health outcomes in treatment effectiveness evaluations: conceptual and methodological challenges. Med Care 2000;38(9 Suppl):II14–25.