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Longitudinal impact of frequent knee and back pain on health-related quality of life: data from the osteoarthritis initiative
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WCPT Congress 2015 / Physiotherapy 2015; Volume 101, Supplement 1 eS26–eS426
and knee strength is closely related to the degree of knee flexion at which peak knee valgus occurs. Methods: A correlational research design was chosen to test the hypotheses of this study in 30 healthy subjects (17 males and 13 females). Procedures included isometric strength testing using the DILLON ED junior dynamometer for hip (abduction/adduction, flexion/extension, and internal/external rotation) and knee (flexion/extension). Subjects were videotaped as they performed single leg squats using two digital video cameras. Video data for squat trials were analysed using the siliconCOACH Pro Version 6. Results: ICC values indicated excellent reliability for peak knee valgus angle and knee flexion angle, .948 and .933, respectively. Pearson correlation coefficients demonstrated significant negative relationships between hip abduction (r = −.550), adduction (r = −.475), extension (r = −.421), knee extension (r = −.504) strength, and peak knee valgus angle. Linear regression analysis revealed that hip extensor, abductor, adductor and knee extensor accounted for 17.7%, 30.3%, 26.6% and 25.4%, respectively, of variance in peak knee valgus angle. No significant relationships were found between the strength measures of the hip and knee muscles, and the knee flexion angle when peak knee valgus occurred. Conclusion(s): Decreased isometric strength of the hip abductors, adductors, extensors and knee extensors was closely associated with increased peak valgus angle at the knee. The apparent lack of a significant relationship between strength measures and knee flexion at peak valgus angle suggests that absolute strength is not responsible for predicting knee flexion position. Implications: The current study provided some support that excessive knee valgus is potentially associated with poor hip and knee control in the frontal plane. Identifying the effect of muscular strength on the frontal plane position offers the potential for intervention, hence reducing the effect of malalignment as a contributor to injury risk. Keywords: Peak knee valgus angle; Muscle strength; Single leg squat Funding acknowledgements: This study was funded by Medical Services of the Saudi Armed Forces. Ethics approval: This study was approved by the School of Healthcare Studies Ethical Research Committee, Cardiff University. http://dx.doi.org/10.1016/j.physio.2015.03.298
Research Report Poster Presentation Number: RR-PO-15-01-Sun Sunday 3 May 2015 12:15 Exhibit halls 401–403 LONGITUDINAL IMPACT OF FREQUENT KNEE AND BACK PAIN ON HEALTH-RELATED QUALITY OF LIFE: DATA FROM THE OSTEOARTHRITIS INITIATIVE S.M. Bindawas, V. Vennu King Saud University, Rehabilitation Sciences, Riyadh, Saudi Arabia Background: The frequent knee pain (KP) and back pain (BP) are two prevalent musculoskeletal conditions that associated with limited physical function and disability. Purpose: The purpose of the present study was to examine the longitudinal impact of self-reported frequent KP and BP on Health-Related Quality of Life (HRQoL) among older men and women. Methods: A 6-year prospective cohort of 1350 men’s and women’s aged 45–79 at baseline from the Osteoarthritis Initiative (OAI) study. Baseline self-reported frequent KP and BP were used to classify participants into four groups: no frequent KP and no BP; BP and no frequent KP; frequent KP and no BP; and frequent KP and BP. HRQoL was measured by using the two summary scale: physical composite scale (PCS) and mental composite scale (MCS) of the health survey short form (SF)-12. Results: Using general linear mixed models, we found a significant association between frequent KP and BP with decreased HRQoL over time. After controlling for potential confounding factors, frequent KP and BP were associated with decreased HRQoL in men (PCS: b = −4.95, SE = 0.61, p < .0001; MCS: b = −1.37, SE = 0.49, p = 0.006) and in women (PCS: b = −6.04, SE = 0.60, p < .0001; MCS: b = −1.42, SE = 0.57, p = 0.013) respectively compared to no frequent KP and no BP. Conclusion(s): Our results suggest that both frequent KP and BP are associated with decreased HRQoL over time; and decreased faster in women. Implications: Understanding the impact of musculoskeletal pain among elderly may lead to the implementation of effective preventive measures, thus improving HRQoL and reducing public health expenditure. Keywords: Knee pain; Back pain; Quality of life Funding acknowledgements: Supported by King Saud University. The sponsor had no role in the methods, data collection, analysis, or preparation of the abstract. Ethics approval: The OAI study protocol was approved by the Institutional Review Boards at the University of California, San Francisco. http://dx.doi.org/10.1016/j.physio.2015.03.299
WCPT Congress 2015 / Physiotherapy 2015; Volume 101, Supplement 1 eS26–eS426
and knee strength is closely related to the degree of knee flexion at which peak knee valgus occurs. Methods: A correlational research design was chosen to test the hypotheses of this study in 30 healthy subjects (17 males and 13 females). Procedures included isometric strength testing using the DILLON ED junior dynamometer for hip (abduction/adduction, flexion/extension, and internal/external rotation) and knee (flexion/extension). Subjects were videotaped as they performed single leg squats using two digital video cameras. Video data for squat trials were analysed using the siliconCOACH Pro Version 6. Results: ICC values indicated excellent reliability for peak knee valgus angle and knee flexion angle, .948 and .933, respectively. Pearson correlation coefficients demonstrated significant negative relationships between hip abduction (r = −.550), adduction (r = −.475), extension (r = −.421), knee extension (r = −.504) strength, and peak knee valgus angle. Linear regression analysis revealed that hip extensor, abductor, adductor and knee extensor accounted for 17.7%, 30.3%, 26.6% and 25.4%, respectively, of variance in peak knee valgus angle. No significant relationships were found between the strength measures of the hip and knee muscles, and the knee flexion angle when peak knee valgus occurred. Conclusion(s): Decreased isometric strength of the hip abductors, adductors, extensors and knee extensors was closely associated with increased peak valgus angle at the knee. The apparent lack of a significant relationship between strength measures and knee flexion at peak valgus angle suggests that absolute strength is not responsible for predicting knee flexion position. Implications: The current study provided some support that excessive knee valgus is potentially associated with poor hip and knee control in the frontal plane. Identifying the effect of muscular strength on the frontal plane position offers the potential for intervention, hence reducing the effect of malalignment as a contributor to injury risk. Keywords: Peak knee valgus angle; Muscle strength; Single leg squat Funding acknowledgements: This study was funded by Medical Services of the Saudi Armed Forces. Ethics approval: This study was approved by the School of Healthcare Studies Ethical Research Committee, Cardiff University. http://dx.doi.org/10.1016/j.physio.2015.03.298
Research Report Poster Presentation Number: RR-PO-15-01-Sun Sunday 3 May 2015 12:15 Exhibit halls 401–403 LONGITUDINAL IMPACT OF FREQUENT KNEE AND BACK PAIN ON HEALTH-RELATED QUALITY OF LIFE: DATA FROM THE OSTEOARTHRITIS INITIATIVE S.M. Bindawas, V. Vennu King Saud University, Rehabilitation Sciences, Riyadh, Saudi Arabia Background: The frequent knee pain (KP) and back pain (BP) are two prevalent musculoskeletal conditions that associated with limited physical function and disability. Purpose: The purpose of the present study was to examine the longitudinal impact of self-reported frequent KP and BP on Health-Related Quality of Life (HRQoL) among older men and women. Methods: A 6-year prospective cohort of 1350 men’s and women’s aged 45–79 at baseline from the Osteoarthritis Initiative (OAI) study. Baseline self-reported frequent KP and BP were used to classify participants into four groups: no frequent KP and no BP; BP and no frequent KP; frequent KP and no BP; and frequent KP and BP. HRQoL was measured by using the two summary scale: physical composite scale (PCS) and mental composite scale (MCS) of the health survey short form (SF)-12. Results: Using general linear mixed models, we found a significant association between frequent KP and BP with decreased HRQoL over time. After controlling for potential confounding factors, frequent KP and BP were associated with decreased HRQoL in men (PCS: b = −4.95, SE = 0.61, p < .0001; MCS: b = −1.37, SE = 0.49, p = 0.006) and in women (PCS: b = −6.04, SE = 0.60, p < .0001; MCS: b = −1.42, SE = 0.57, p = 0.013) respectively compared to no frequent KP and no BP. Conclusion(s): Our results suggest that both frequent KP and BP are associated with decreased HRQoL over time; and decreased faster in women. Implications: Understanding the impact of musculoskeletal pain among elderly may lead to the implementation of effective preventive measures, thus improving HRQoL and reducing public health expenditure. Keywords: Knee pain; Back pain; Quality of life Funding acknowledgements: Supported by King Saud University. The sponsor had no role in the methods, data collection, analysis, or preparation of the abstract. Ethics approval: The OAI study protocol was approved by the Institutional Review Boards at the University of California, San Francisco. http://dx.doi.org/10.1016/j.physio.2015.03.299