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Singh A, Venn A, Blizzard L, March L, Eckstein F, Jones G, Wirth W, Cicuttini F, Ding C, Antony B. Association between knee magnetic resonance imaging markers and knee symptoms over 6-9 years in young adults. Rheumatology (Oxford) 2024; 63:436-445. [PMID: 37202358 PMCID: PMC10836990 DOI: 10.1093/rheumatology/kead227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 03/16/2023] [Accepted: 04/04/2023] [Indexed: 05/20/2023] Open
Abstract
OBJECTIVES To describe associations between MRI markers with knee symptoms in young adults. METHODS Knee symptoms were assessed using the WOMAC scale during the Childhood Determinants of Adult Health Knee Cartilage study (CDAH-knee; 2008-2010) and at the 6- to 9-year follow-up (CDAH-3; 2014-2019). Knee MRI scans obtained at baseline were assessed for morphological markers (cartilage volume, cartilage thickness, subchondral bone area) and structural abnormalities [cartilage defects and bone marrow lesions (BMLs)]. Univariable and multivariable (age, sex, BMI adjusted) zero-inflated Poisson (ZIP) regression models were used for analysis. RESULTS The participants' mean age in CDAH-knee and CDAH-3 were 34.95 (s.d. 2.72) and 43.27 (s.d. 3.28) years, with 49% and 48% females, respectively. Cross-sectionally, there was a weak but significant negative association between medial femorotibial compartment (MFTC) [ratio of the mean (RoM) 0.99971084 (95% CI 0.9995525, 0.99986921), P < 0.001], lateral femorotibial compartment (LFTC) [RoM 0.99982602 (95% CI 0.99969915, 0.9999529), P = 0.007] and patellar cartilage volume [RoM 0.99981722 (95% CI 0.99965326, 0.9999811), P = 0.029] with knee symptoms. Similarly, there was a negative association between patellar cartilage volume [RoM 0.99975523 (95% CI 0.99961427, 0.99989621), P = 0.014], MFTC cartilage thickness [RoM 0.72090775 (95% CI 0.59481806, 0.87372596), P = 0.001] and knee symptoms assessed after 6-9 years. The total bone area was negatively associated with knee symptoms at baseline [RoM 0.9210485 (95% CI 0.8939677, 0.9489496), P < 0.001] and 6-9 years [RoM 0.9588811 (95% CI 0.9313379, 0.9872388), P = 0.005]. The cartilage defects and BMLs were associated with greater knee symptoms at baseline and 6-9 years. CONCLUSION BMLs and cartilage defects were positively associated with knee symptoms, whereas cartilage volume and thickness at MFTC and total bone area were weakly and negatively associated with knee symptoms. These results suggest that the quantitative and semiquantitative MRI markers can be explored as a marker of clinical progression of OA in young adults.
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Affiliation(s)
- Ambrish Singh
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TS, Australia
| | - Alison Venn
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TS, Australia
| | - Leigh Blizzard
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TS, Australia
| | - Lyn March
- Institute of Bone and Joint Research, Kolling Institute of Medical Research, University of Sydney, Sydney, NSW, Australia
- Florance and Cope Professorial Rheumatology Department, University of Sydney Royal North Shore Hospital, St Leonards, Sydney, NSW, Australia
| | - Felix Eckstein
- Chondrometrics GmbH, Ainring, Germany
- Department of Imaging and Functional Musculoskeletal Research, Institute of Anatomy & Cell Biology, Paracelsus Medical University Salzburg & Nuremberg, Salzburg, Austria
- Ludwig Boltzmann Institute for Arthritis and Rehabilitation, Paracelsus Medical University, Salzburg, Austria
| | - Graeme Jones
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TS, Australia
| | - Wolfgang Wirth
- Chondrometrics GmbH, Ainring, Germany
- Department of Imaging and Functional Musculoskeletal Research, Institute of Anatomy & Cell Biology, Paracelsus Medical University Salzburg & Nuremberg, Salzburg, Austria
- Ludwig Boltzmann Institute for Arthritis and Rehabilitation, Paracelsus Medical University, Salzburg, Austria
| | - Flavia Cicuttini
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC, Australia
| | - Changhai Ding
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TS, Australia
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC, Australia
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Benny Antony
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TS, Australia
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Does lower educational attainment increase the risk of osteoarthritis surgery? a Swedish twin study. BMC Musculoskelet Disord 2023; 24:72. [PMID: 36707830 PMCID: PMC9883874 DOI: 10.1186/s12891-023-06163-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 01/16/2023] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Previous studies have reported an inverse association between educational attainment and different osteoarthritis (OA) outcomes. However, none of the previous studies have accounted for potential confounding by early-life environment and genetics. Thus, we aimed to examine the association between educational attainment and knee and hip OA surgery using twin data. METHODS From the Swedish Twin Registry (STR), we identified dizygotic (DZ) and monozygotic (MZ) twins. All twins in the STR aged 35 to 64 years were followed from January the 1st 1987 or the date they turned 35 years until OA surgery, relocation outside Sweden, death or the end of 2016 (18,784 DZ and 8,657 MZ complete twin pairs). Associations between educational attainment and knee and hip OA surgery were estimated in models matched on twin pairs, using Weibull within-between (WB) shared frailty model. RESULTS For knee OA surgery, the analysis matched on MZ twins yielded a within-estimate hazard ratio (HR) per 3 years of education, of 1.06 (95% CI: 0.81, 1.32), suggesting no association between the outcome and the individual´s education. Rather, there seemed to be a so called familial effect of education, with a between-pair estimate of HR = 0.71 (95% CI: 0.41, 1.01). For hip OA surgery, the within- and between-pair estimates for MZ twins were 0.92 (95% CI: 0.69, 1.14) and 1.15 (95% CI: 0.87, 1.42), respectively. CONCLUSIONS Our results suggest that the inverse associations between education and knee/hip OA surgery observed in cohort studies are potentially confounded by unobserved familial factors like genetics and/or early life exposures.
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Holowka NB, Wallace IJ, Mathiessen A, Mang'eni Ojiambo R, Okutoyi P, Worthington S, Lieberman DE. Urbanization and Knee Cartilage Growth Among Children and Adolescents in Western Kenya. ACR Open Rheumatol 2021; 3:765-770. [PMID: 34448545 PMCID: PMC8593811 DOI: 10.1002/acr2.11323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 07/23/2021] [Indexed: 11/10/2022] Open
Abstract
Objective Previous studies have demonstrated that low physical activity levels during youth are associated with the development of thin knee cartilage, which may increase susceptibility to osteoarthritis later in life. Here, we propose and test the hypothesis that reductions in physical activity impair knee cartilage growth among people in developing countries experiencing urbanization and increased market integration. Methods Ultrasonography was used to measure knee cartilage thickness in 168 children and adolescents (aged 8‐17 years) from two groups in western Kenya: a rural, physically active group from a small‐scale farming community and an urban, less physically active group from the nearby city of Eldoret. We used general linear models to assess the relative effects of age on cartilage thickness in these two groups, controlling for sex and leg length. Results Both groups exhibited significant reductions in knee cartilage thickness with increasing age (P < 0.0001; 95% confidence interval [CI] 0.15‐0.06 mm), yet the rate of reduction was significantly less in the rural than in the urban group (P = 0.012; 95% CI 0.01‐0.10 mm). Conclusion The results support our hypothesis by showing that individuals from the more physically active rural group exhibited less knee cartilage loss during youth than the more sedentary urban group. Our findings suggest that reduced physical activity associated with urbanization in developing nations may affect adult knee cartilage thickness and thus could be a factor that increases susceptibility to osteoarthritis.
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Affiliation(s)
- Nicholas B Holowka
- Harvard University, Cambridge, Massachusetts, and University at Buffalo, Buffalo, New York
| | - Ian J Wallace
- Harvard University, Cambridge, Massachusetts, and The University of New Mexico, Albuquerque
| | | | - Robert Mang'eni Ojiambo
- Moi University School of Medicine, Eldoret, Kenya, and University of Global Health Equity, Butaro, Rwanda
| | - Paul Okutoyi
- Moi University School of Medicine, Eldoret, Kenya
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Vo MT, Singh A, Meng T, Kaur J, Venn A, Cicuttini F, March L, Cross M, Dwyer T, Halliday A, Jones G, Ding C, Antony B. Prevalence and Clinical Significance of Residual or Reconverted Red Bone Marrow on Knee MRI. Diagnostics (Basel) 2021; 11:diagnostics11091531. [PMID: 34573874 PMCID: PMC8466981 DOI: 10.3390/diagnostics11091531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 08/17/2021] [Accepted: 08/18/2021] [Indexed: 12/12/2022] Open
Abstract
Background: Residual/reconverted red bone marrow (RBM) in adult knees is occasionally observed on routine knee magnetic resonance imaging (MRI). We aimed to identify its prevalence, distribution, and associations with lifestyle factors, knee structural abnormalities, and knee symptoms in young adults. Methods: Participants (n = 327; aged = 31–41 years) were selected from the Childhood Determinants of Adult Health (CDAH) knee study. They underwent T1-weighted and proton-density-weighted fat-suppressed MRI scans of knees. Residual/reconverted RBM in distal femur and proximal tibia were graded semi-quantitatively (grades: 0–3) based on the percentage area occupied. Knee structural abnormalities were graded semi-quantitatively using previously published MRI scoring systems. Knee symptoms (pain, stiffness, and dysfunction) were assessed using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scale during CDAH knee study (year: 2008–2010) and at 6–9-year follow-up during the CDAH-3 study (year: 2014–2019). Associations between definite RBM (grade ≥ 2) and lifestyle factors, knee symptoms, and structural abnormalities were described using log-binomial regressions. Results: Definite RBM was seen in females only, in 29 out of 154 cases (18.8%), with femoral involvement preceding tibial involvement. Definite RBM was associated with increased BMI (PR = 1.09/kg/m2; 95% CI: 1.03, 1.16), overweight status (PR = 2.19; 95% CI: 1.07, 4.51), and WOMAC knee pain (PR = 1.75; 95% CI: 1.11, 2.74) in cross-section analysis. However, there was no association between RBM and knee-pain after seven years (PR = 1.15; 95% CI: 0.66, 2.00). There were no associations between RBM and knee structural abnormalities. Conclusion: Presence of definite RBM in young adult knees was observed in females only. Definite RBM was associated with overweight measures, and the modest association with knee pain may not be causally related.
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Affiliation(s)
- Minh Tu Vo
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS 7000, Australia; (M.T.V.); (A.S.); (T.M.); (J.K.); (A.V.); (T.D.); (G.J.); (C.D.)
| | - Ambrish Singh
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS 7000, Australia; (M.T.V.); (A.S.); (T.M.); (J.K.); (A.V.); (T.D.); (G.J.); (C.D.)
| | - Tao Meng
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS 7000, Australia; (M.T.V.); (A.S.); (T.M.); (J.K.); (A.V.); (T.D.); (G.J.); (C.D.)
| | - Jasveen Kaur
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS 7000, Australia; (M.T.V.); (A.S.); (T.M.); (J.K.); (A.V.); (T.D.); (G.J.); (C.D.)
| | - Alison Venn
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS 7000, Australia; (M.T.V.); (A.S.); (T.M.); (J.K.); (A.V.); (T.D.); (G.J.); (C.D.)
| | - Flavia Cicuttini
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC 3004, Australia;
| | - Lyn March
- Institute of Bone and Joint Research, University of Sydney, Sydney, NSW 2065, Australia; (L.M.); (M.C.)
| | - Marita Cross
- Institute of Bone and Joint Research, University of Sydney, Sydney, NSW 2065, Australia; (L.M.); (M.C.)
| | - Terence Dwyer
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS 7000, Australia; (M.T.V.); (A.S.); (T.M.); (J.K.); (A.V.); (T.D.); (G.J.); (C.D.)
- The George Institute for Global Health, Nuffield Department of Obstetrics & Gynaecology, University of Oxford, Oxford OX3 9DU, UK
| | - Andrew Halliday
- Department of Radiology, Royal Hobart Hospital, Hobart, TAS 7000, Australia;
| | - Graeme Jones
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS 7000, Australia; (M.T.V.); (A.S.); (T.M.); (J.K.); (A.V.); (T.D.); (G.J.); (C.D.)
| | - Changhai Ding
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS 7000, Australia; (M.T.V.); (A.S.); (T.M.); (J.K.); (A.V.); (T.D.); (G.J.); (C.D.)
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC 3004, Australia;
- Clinical Research Centre, Zhujiang Hospital of Southern Medical University, Guangzhou 510280, China
| | - Benny Antony
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS 7000, Australia; (M.T.V.); (A.S.); (T.M.); (J.K.); (A.V.); (T.D.); (G.J.); (C.D.)
- Correspondence:
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Association of adiposity measures in childhood and adulthood with knee cartilage thickness, volume and bone area in young adults. Int J Obes (Lond) 2018; 43:1411-1421. [PMID: 30349008 DOI: 10.1038/s41366-018-0234-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 09/01/2018] [Accepted: 09/06/2018] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To describe the associations of childhood and adulthood adiposity measures with knee cartilage thickness, volume and bone area in young adults. METHODS Childhood and adulthood adiposity measures (weight, height, waist circumference and hip circumference) of 186 participants were collected in 1985 (aged 7-15 years) and during 2004-2006 (aged 26-36 years). Knee magnetic resonance imaging was conducted during 2008-2010 (aged 31-41 years) and cartilage thickness, volume and bone area were measured using a quantitative approach (Chondrometrics, Germany). Linear regressions were used to examine the above associations. RESULTS The prevalence of overweight was 7.6% in childhood and 42.1% in adulthood. Childhood weight (β = - 5.57 mm2/kg) and body mass index (BMI) (β = - 11.55 mm2/kg/m2) were negatively associated with adult patellar bone area, whereas adult weight was positively associated with bone area in medial femorotibial compartment (MFTC) (β = 3.37 mm2/kg) and lateral femorotibial compartment (LFTC) (β = 2.08 mm2/kg). Adult waist-hip ratio (WHR) was negatively associated with cartilage thickness (MFTC: β = - 0.011; LFTC: β = - 0.012 mm/0.01 unit), volume (Patella: β = - 20.97; LFTC: β = - 21.71 mm3/0.01 unit) and bone area (Patella: β = - 4.39 mm2/0.01 unit). The change in WHR z-scores from childhood to adulthood was negatively associated with cartilage thickness (MFTC: β = - 0.056 mm), volume (patella: - 89.95; LFTC: - 93.98 mm3), and bone area (patella: - 20.74 mm2). All p-values < 0.05. CONCLUSIONS Childhood weight and BMI were negatively but adult weight was positively associated with adult bone area. Adult WHR and the change in WHR from childhood to adulthood were negatively associated with cartilage thickness, volume, and bone area. These suggest early-life adiposity measures may affect knee structures in young adults.
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Antony B, Jones G, Jin X, Ding C. Do early life factors affect the development of knee osteoarthritis in later life: a narrative review. Arthritis Res Ther 2016; 18:202. [PMID: 27623622 PMCID: PMC5022173 DOI: 10.1186/s13075-016-1104-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Osteoarthritis (OA) mainly affects older populations; however, it is possible that early life factors contribute to the development of OA in later life. The aim of this review is to describe the association between childhood or early adulthood risk factors and knee pain, structural imaging markers and development of knee OA in later life. A narrative overview of the literature synthesising the findings of literature retrieved from searches of computerised databases and manual searches was conducted. We found that only a few studies have explored the long-term effect of childhood or early adulthood risk factors on the markers of joint health that predispose people to OA or joint symptoms. High body mass index (BMI) and/or overweight status from childhood to adulthood were independently related to knee pain and OA in later life. The findings regarding the association between strenuous physical activity and knee structures in young adults are still conflicting. However, a favourable effect of moderate physical activity and fitness on knee structures is reported. Childhood physical activity and performance measures had independent beneficial effects on knee structures including knee cartilage in children and young adults. Anterior knee pain syndrome in adolescence could lead to the development of patellofemoral knee OA in the late 40s. Furthermore, weak evidence suggests that childhood malalignment, socioeconomic status and physical abuse are associated with OA in later life. The available evidence suggests that early life intervention may prevent OA in later life.
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Affiliation(s)
- Benny Antony
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, Tasmania, 7000, Australia.
| | - Graeme Jones
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, Tasmania, 7000, Australia
| | - Xingzhong Jin
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, Tasmania, 7000, Australia
| | - Changhai Ding
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, Tasmania, 7000, Australia.,Institute of Bone & Joint Translational Research, Southern Medical University, Guangzhou, Guangdong, China
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Antony B, Venn A, Cicuttini F, March L, Blizzard L, Dwyer T, Cross M, Jones G, Ding C. Association of Body Composition and Hormonal and Inflammatory Factors With Tibial Cartilage Volume and Sex Difference in Cartilage Volume in Young Adults. Arthritis Care Res (Hoboken) 2016; 68:517-25. [PMID: 26386243 DOI: 10.1002/acr.22715] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2014] [Revised: 08/11/2015] [Accepted: 08/18/2015] [Indexed: 12/24/2022]
Abstract
OBJECTIVE To describe the associations between body composition and hormonal and inflammatory factors measured 5 years prior and tibial cartilage volume in young adults, and to explore if these factors contribute to the sex difference in tibial cartilage volume. METHODS Subjects broadly representative of the young adult Australian population (n = 328, ages 31-41 years, 47.3% women) were selected. They underwent T1-weighted fat-suppressed magnetic resonance imaging (MRI) of their knees. Tibial cartilage volume was measured from MRI. Sex hormone binding globulin (SHBG) and testosterone in a subset of women and C-reactive protein (CRP) level and fibrinogen in both sexes were measured 5 years prior. Body mass index (BMI), fat mass, and lean mass were calculated from height, weight, and skinfolds. RESULTS In multivariable analyses, correlates of tibial cartilage volume included lean body mass (β = 26.4 mm(3) ; 95% confidence interval [95% CI] 13.6, 39.1), fat mass (β = -11.8 mm(3) ; 95% CI -22.2, -1.4), and fibrinogen (β = -146.4 mm(3) ; 95% CI -276.4, -16.4), but not BMI, testosterone, or CRP level. In women, SHBG was positively associated with tibial cartilage volume (β = 0.67 mm(3) ; 95% CI 0.14, 1.20) and Free Androgen Index was negatively associated with lateral tibial cartilage volume (β = -0.04 mm(3) ; 95% CI -0.07, 0.00). Men had 13% more tibial cartilage volume (500 mm(3) ) than women. The magnitude of this association decreased by 38%, 20%, and 37% after adjustment for lean body mass, fat mass, and fibrinogen, respectively. CONCLUSION Body composition, sex hormones, and fibrinogen correlate with knee cartilage volume in young adult life. Sex difference in knee cartilage volume is contributed largely by variations in body composition and/or fibrinogen.
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Affiliation(s)
- Benny Antony
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Alison Venn
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | | | - Lyn March
- Institute of Bone and Joint Research, University of Sydney, Sydney, Australia
| | - Leigh Blizzard
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Terence Dwyer
- Murdoch Children's Research Institute, Melbourne, Australia
| | - Marita Cross
- Institute of Bone and Joint Research, University of Sydney, Sydney, Australia
| | - Graeme Jones
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Changhai Ding
- Menzies Institute for Medical Research, Tasmania, Hobart, Australia, and Monash University, Melbourne, Australia
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Antony B, Venn A, Cicuttini F, March L, Blizzard L, Dwyer T, Cross M, Jones G, Ding C. Association of physical activity and physical performance with tibial cartilage volume and bone area in young adults. Arthritis Res Ther 2015; 17:298. [PMID: 26503530 PMCID: PMC4623258 DOI: 10.1186/s13075-015-0813-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 10/08/2015] [Indexed: 11/20/2022] Open
Abstract
Introduction Physical activity has been recommended to patients with knee osteoarthritis for improving their symptoms. However, it is still controversial if physical activity has effects on joint structures including cartilage volume. The aim of this study was to describe the associations between physical activity and performance measured 5 years prior and tibial cartilage volume and bone area in young adults. Methods Subjects broadly representative of the Australian population (n = 328, aged 31–41 years, female 47.3 %) were selected from the Childhood Determinants of Adult Health study. They underwent T1-weighted fat-suppressed magnetic resonance imaging (MRI) scans of their knees. Tibial bone area and cartilage volume were measured from MRI. Physical activity (measured using long international physical activity questionnaire (IPAQ)) and performance measures (long jump, leg muscle strength, physical work capacity (PWC170)) were measured 5 years prior. Results In multivariable analyses, total physical activity (min/week) (β: 0.30 mm3, 95 % CI: 0.13,0.47), vigorous (β: 0.54 mm3, 95 % CI: 0.13,0.94), moderate (β: 0.34 mm3, 95 % CI: 0.01,0.67), walking (β: 0.40 mm3, 95 % CI: 0.07,0.72) and IPAQ category (β: 182.9 mm3, 95 % CI: 51.8,314.0) were positively associated with total tibial cartilage volume but not tibial bone area. PWC170, long jump and leg muscle strength were positively and significantly associated with both total tibial cartilage volume and total tibial bone area; and the associations with tibial cartilage volume decreased in magnitude but remained significant for PWC170 and long jump after further adjustment for tibial bone area. Conclusion While tibial bone area is affected only by physical performance, total tibial cartilage volume can be influenced by both physical activity and performance in younger adults. The clinical significance suggests a beneficial effect for cartilage but the bone area association was restricted to performance suggesting other factors rather than physical activity may be important.
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Affiliation(s)
- Benny Antony
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia.
| | - Alison Venn
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia.
| | - Flavia Cicuttini
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia.
| | - Lyn March
- Institute of Bone and Joint Research, University of Sydney, Sydney, Australia.
| | - Leigh Blizzard
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia.
| | - Terence Dwyer
- Murdoch Childrens Research Institute, Melbourne, Australia.
| | - Marita Cross
- Institute of Bone and Joint Research, University of Sydney, Sydney, Australia.
| | - Graeme Jones
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia.
| | - Changhai Ding
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia. .,Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia.
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