The Joint Space in Normal Hip Radiographs

Fredensborg, N; Nilsson, Bo

doi:10.1148/126.2.325

Cited by 36 publications

(13 citation statements)

References 2 publications

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“…Although our results differ from those of previous studies (4,5), they are from a much larger sample of men and women and are likely to be more robust through the exclusion of subjects both with hip pain and with any degree of structural change. Clearly, there are limitations to a cross-sectional study; therefore, the results cannot be definitely assumed to imply that aging itself causes a reduction in joint space.…”

Section: Discussioncontrasting

confidence: 99%

Age and sex differences in hip joint space among asymptomatic subjects without structural change: Implications for epidemiologic studies

Lanyon

Muir

Doherty

et al. 2003

Arthritis & Rheumatism

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Objective. The prevalence of hip osteoarthritis (OA) increases significantly with age. Although it is not clear whether joint space loss at the hip is a feature of normal aging or a reflection of the OA process, epidemiologic criteria for OA are based on narrowing alone. The aim of this study was to determine whether changes in joint space width occur with age, and whether there are sex differences, in asymptomatic subjects without hip OA.Methods. We identified a total of 1,806 subjects who had undergone intravenous urography between 1994 and 1996 and sent a questionnaire to the 1,527 of these subjects who were alive in 1998; 1,031 replies (68%) were received. All radiographs were read by an observer blinded to age, sex, and pain status. Individual radiographic features of OA (narrowing, osteophyte, sclerosis, and cysts) were graded, and an overall qualitative grade was allocated, according to a standard atlas. Minimum joint space width (JSW) was measured by metered caliper to within 0.1 mm. A total of 276 women (mean age 63 years) and 257 men (mean age 64 years) were identified who had never had hip pain (defined as having ever had pain on most days for at least 1 month) and who had no evidence of either joint space narrowing or osteophyte (grade 0, no structural changes). The minimum JSW in either hip was tabulated according to age. Conclusion. These sex differences in joint space have significant implications in terms of the major emphasis on joint space narrowing in definitions of hip OA. Women also have a significant progressive decline in joint space with age that is not seen in men. This suggests that in women, loss of cartilage may be an age-related phenomenon that is independent of other aspects of structural change. Consideration should be given to the development of sex-specific definitions of hip "OA." Results. JSW measurement was reproducible

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Section: Discussioncontrasting

confidence: 99%

Age and sex differences in hip joint space among asymptomatic subjects without structural change: Implications for epidemiologic studies

Lanyon

Muir

Doherty

et al. 2003

Arthritis & Rheumatism

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“…20 The mean joint space in the present material decreased slightly with age (fig2), and was 0.3 mm less in women than in men in all age groups (fig 2). In contrast, a previous study37 found a slight increase in joint space with age, and no difference in joint space between men and women. The latter study, however, excluded any hips with signs of OA.…”

Section: Discussioncontrasting

confidence: 70%

Prevalence of hip osteoarthritis in Iceland

Ingvarsson

Hägglund²,

Lohmander³

1999

Annals of the Rheumatic Diseases

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Results-Of the 1517 people included, 227 hips in 165 patients (77 men, 88 women) were diagnosed as having radiological primary hip OA. The mean age at colon examination for these patients was 68 (35-89) years. The overall prevalence of coxarthrosis among all examined patients 35 years and older was 10.8% (12% for men, 10% for women), rising from 2% at 35-39 years to 35.4% for those 85 years or older. If the population structure (age and sex distribution) for those older than 35 years in Iceland was used to standardise prevalence for both Iceland and south Sweden (using previously published data for south Sweden), the age and sex standardised prevalence of hip OA for those older than 35 years in Iceland was 8%, compared with 1.2% for south Sweden. Conclusions-The prevalence of radiological primary hip OA is very high in Iceland, and in excess of fivefold higher than the prevalence found by using similar techniques in studies on related populations in southern Scandinavia. The rate diVerence is particularly notable for those younger than 70 years.

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“…Differences in positioning of the measurement points across observers possibly contributed to the poor interobserver agreement, which was evaluated on the basis of both measurement point positioning and cartilage thickness measurement. The same measurement points were used in previous studies on anteroposterior radiographs of the hip or on three-dimensional MR images (15,17,18,22,23). The 130°neck shaft angle that determines the position of the apical point varies somewhat across individuals but was used for all measurements in each hip and, therefore, did not affect comparisons within a given hip.…”

Section: Discussionmentioning

confidence: 99%

Hyaline Cartilage Thickness in Radiographically Normal Cadaveric Hips: Comparison of Spiral CT Arthrographic and Macroscopic Measurements

Wyler¹,

Bousson²,

Bergot³

et al. 2007

Radiology

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Purpose:To assess spiral multidetector computed tomographic (CT) arthrography for the depiction of cartilage thickness in hips without cartilage loss, with evaluation of anatomic slices as the reference standard. Materials and Methods:Permission to perform imaging studies in cadaveric specimens of individuals who had willed their bodies to science was obtained from the institutional review board. Two independent observers measured the femoral and acetabular hyaline cartilage thickness of 12 radiographically normal cadaveric hips (from six women and five men; age range at death, 52-98 years; mean, 76.5 years) on spiral multidetector CT arthrographic reformations and on coronal anatomic slices. Regions of cartilage loss at gross or histologic examination were excluded. CT arthrographic and anatomic measurements in the coronal plane were compared by using Bland-Altman representation and a paired t test. Differences between mean cartilage thicknesses at the points of measurement were tested by means of analysis of variance. Interobserver and intraobserver reproducibilities were determined. Results:At CT arthrography, mean cartilage thickness ranged from 0.32 to 2.53 mm on the femoral head and from 0.95 to 3.13 mm on the acetabulum. Observers underestimated cartilage thickness in the coronal plane by 0.30 mm Ϯ 0.52 (mean Ϯ standard error) at CT arthrography (P Ͻ .001) compared with the anatomic reference standard. Ninetyfive percent of the differences between CT arthrography and anatomic values ranged from Ϫ1.34 to 0.74 mm. The difference between mean cartilage thicknesses at the different measurement points was significant for coronal spiral multidetector CT arthrography and anatomic measurement of the femoral head and acetabulum and for sagittal and transverse CT arthrography of the femoral head (P Ͻ .001). Changes in cartilage thickness from the periphery to the center of the joint ("gradients") were found by means of spiral multidetector CT arthrography and anatomic measurement. Conclusion:Spiral multidetector CT arthrography depicts cartilage thickness gradients in radiographically normal cadaveric hips. RSNA, 2007 1 From the Departments of Skeletal Radiology (A.W., V.B., J.D.L.) and Pathology (M.P.), Lariboisiè re Teaching Hospital,

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The Joint Space in Normal Hip Radiographs

Cited by 36 publications

References 2 publications

Age and sex differences in hip joint space among asymptomatic subjects without structural change: Implications for epidemiologic studies

Age and sex differences in hip joint space among asymptomatic subjects without structural change: Implications for epidemiologic studies

Prevalence of hip osteoarthritis in Iceland

Hyaline Cartilage Thickness in Radiographically Normal Cadaveric Hips: Comparison of Spiral CT Arthrographic and Macroscopic Measurements

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