Journal List > Korean J Gastroenterol > v.68(1) > 1007556

Park, Park, Shim, Kim, Kim, Han, Kim, Bang, Kim, Baik, Kim, Park, and Kim: The Prevalence and Clinical Features of Non-responsive Gastroesophageal Reflux Disease to Practical Proton Pump Inhibitor Dose in Korea: A Multicenter Study

Abstract

Background/Aims

In Korea, there are no available multicenter data concerning the prevalence of or diagnostic approaches for non-responsive gastroesophageal reflux disease (GERD) which does not respond to practical dose of proton pump inhibitor (PPI) in Korea. The purpose of this study is to evaluate the prevalence and the symptom pattern of non-responsive GERD.

Methods

A total of 12 hospitals who were members of a Korean GERD research group joined this study. We used the composite score (CS) as a reflux symptom scale which is a standardized questionnaire based on the frequency and severity of typical symptoms of GERD. We defined "non-responsive GERD" as follows: a subject with the erosive reflux disease (ERD) whose CS was not decreased by at least 50% after standard-dose PPIs for 8 weeks or a subject with non-erosive reflux disease (NERD) whose CS was not decreased by at least 50% after half-dose PPIs for 4 weeks.

Results

A total of 234 subjects were analyzed. Among them, 87 and 147 were confirmed to have ERD and NERD, respectively. The prevalence of non-responsive GERD was 26.9% (63/234). The rates of non-responsive GERD were not different between the ERD and NERD groups (25.3% vs. 27.9%, respectively, p=0.664). There were no differences between the non-responsive GERD and responsive GERD groups for sex (p=0.659), age (p=0.134), or BMI (p=0.209). However, the initial CS for epigastric pain and fullness were higher in the non-responsive GERD group (p=0.044, p=0.014, respectively).

Conclusions

In conclusion, this multicenter Korean study showed that the rate of non-responsive GERD was substantially high up to 26%. In addition, the patients with the non-responsive GERD frequently showed dyspeptic symptoms such as epigastric pain and fullness.

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Fig. 1.
Diagram of study process. GERD, gastroesophgeal reflux disease; ERD, erosive reflux disease; NERD, non-erosive reflux disease; F/U, follow up.
kjg-68-16f1.tif
Fig. 2.
Composite scores between intractable gastroesophgeal reflux disease (GERD) and non-intractable GERD. (A) Initial score. (B) Final score.
kjg-68-16f2.tif
Table 1.
Characteristics of Subjects
Characteristic ERD (n=87) NERD (n=147) p-value
Age (yr) 55.7±13.4 50.5±14.0 0.006
Sex (%), male/female 55/45 42/59 0.043
BMI (kg/m2) 24.6±3.5 23.3±3.0 0.002
Underlying disease      
 Angina 7 (8.0) 5 (3.4) 0.135
 Diabetes mellitus 14 (16.1) 9 (6.1) 0.013
 Hypertension 29 (33.7) 29 (19.2) 0.017
 Liver disease 1 (1.1) 5 (3.4) 0.416
 Renal disease 2 (2.3) 0 (0) 0.137
 Lung disease 4 (4.6) 3 (2.0) 0.429
Social habit      
 Smoking 24 (27.9) 27 (18.4) 0.089
 Alcohol 37 (42.5) 46 (31.3) 0.083
Medication      
 NSAID 1 (1.1) 3 (2.0) >0.999
 Cox-2 0 (0.0) 2 (1.3) 0.531
 Aspirin 11 (12.6) 14 (9.5) 0.455
 Steroid 1 (1.1) 1 (0.7) >0.999
 Anti-coagulant 0 (0) 0 (0) NA
 Anti-platelet 8 (9.2) 3 (2.1) 0.013

Values are presented as mean±SD or n (%).

ERD, erosive reflux disease; NERD, non-erosive reflux disease; NA, not available.

Table 2.
Initial and Final Composite Scores in Both Groups
Composite score ERD (n=87) NERD (n=147) p-value
Initial composite score      
 Reflux 3.4±2.0 3.0±2.4 0.192
 Heart burn 2.9±2.6 3.1±2.5 0.465
 Total 6.3±3.4 6.2±3.4 0.751
 Epigastric discomfort 3.4±2.9 2.7±2.4 0.052
 Fullness 1.9±2.1 2.5±2.3 0.053
Final composite score      
 Reflux 0.7±1.1 1.0±1.4 0.081
 Heart burn 0.5±1.1 0.7±1.1 0.061
 Total 1.1±1.9 1.7±2.1 0.036
 Epigastric discomfort 0.5±0.9 1.0±1.8 0.006
 Fullness 0.6±1.2 0.9±1.5 0.095

Values are presented as mean±SD.

ERD, erosive reflux disease; NERD, non-erosive reflux disease.

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