Background: The International Classification of Functioning, Disability and Health (ICF) model, created by the World Health Organization, provides a theoretical framework that can be applied in the diagnosis and treatment of various disorders.
Objects: Our research purposed to ascertain the relationship between structure/function, activity, and participation domain variables of the ICF and pain, pain-associated disability, activities of daily living (ADL), and quality of life in patients with chronic low back pain (LBP).
Methods: Two-hundred patients with chronic LBP (mean age: 35.5 ± 8.8 years, females, n = 40) were recruited from hospital and community settings. We evaluated the body structure/ function domain variable using the Numeric Pain Rating Scale (NPRS) and Roland–Morris disability (RMD) questionnaire. To evaluate the activity domain variable, we used the Oswestry Disability Index (ODI) and Quebec Back Pain Disability Scale (QBDS). For clinical outcome measures, we used Short-form 12 (SF-12). Pearson’s correlation coefficient was used to ascertain the relationships among the variables (p < 0.05). All the participants with LBP received 30 minutes of conventional physical therapy 3 days/week for 4 weeks.
Results: There were significant correlations between the body structure/function domain (NPRS and RMD questionnaire), activity domain (ODI and QBDS), and participation domain variables (SF-12), rending from pre-intervention (r = –0.723 to 0.783) and postintervention (r = –0.742 to 0.757, p < 0.05).
Conclusion: The identification of a significant difference between these domain variables point to important relationships between pain, disability, performance of ADL, and quality in participants with LBP.

INTRODUCTION
MATERIALS AND METHODS
    1. Participants
    2. Clinical Outcome Measurement
    3. Intervention
    4. Statistical Analysis
RESULTS
    1. Clinical and Demographic Characteristics of the LBPPatient Population (N = 200)
    2. Comparison of Pre- and Postintervention Data
    3. Relationships Between Domains Pre-treatments
    4. Relationship Between the Body Structure/FunctionDomain, Activities Domain, and ParticipationDomain Pre-intervention
    5. Relationships Between Domains Postintervention
    6. Relationship Between the Body Structure/FunctionDomain, Activities Domain, and ParticipationDomain Variables Postintervention
DISCUSSION
CONCLUSIONS
FUNDING
ACKNOWLEDGEMENTS
CONFLICTS OF INTEREST
REFERENCES

• Chanhee Park(Department of Physical Therapy, Yonsei University) Corresponding author