Title Page
Contents
ABSTRACT 8
I. INTRODUCTION 11
II. MATERIALS AND METHODS 13
1. Data 13
2. Definition of variables 14
3. Statistical analysis 15
III. RESULTS 17
IV. DISCUSSION 27
V. CONCLUSION 35
REFERENCES 36
Table I. Demographic sample data used in this study 19
Table II. The odds ratio for pain and severe pain according to variables 20
Table III. The average prevalence of pain according to sex and... 21
Table IV. The annual odds ratio for pain and severe pain by group. 22
Fig. 1. The trend in prevalence of pain 23
Fig. 2. The trend in prevalence of severe pain. 24
Fig. 3. The trend in prevalence of pain by sex and age groups: 19-45 years... 25
Fig. 4. The trend in prevalence of severe pain by sex and age 26