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Open Access Research article

The use of digital photographs for the diagnosis of hand osteoarthritis: the AGES-Reykjavik study

Helgi Jonsson1*, Gudrun P Helgadottir2, Thor Aspelund3, Johanna E Sverrisdottir4, Gudny Eiriksdottir4, Sigurdur Sigurdsson4, Gudmundur J Eliasson5, Asbjorn Jonsson1, Thorvaldur Ingvarsson6, Tamara B Harris7, Lenore Launer7 and Vilmundur Gudnason3

Author affiliations

1 Landspitalinn University Hospital, University of Iceland, IS-108 Fossvogur, Reykjavik, ICELAND

2 University of Iceland, Reykjavik, ICELAND

3 Icelandic Heart Association, University of Iceland, Reykjavik, ICELAND

4 Icelandic Heart Association, Kopavogur, ICELAND

5 Roentgen Domus Medica, Reykjavik, ICELAND

6 Akureyri Central Hospital, Akureyri, ICELAND

7 National Institute on Aging, Bethesda, MD, USA

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Citation and License

BMC Musculoskeletal Disorders 2012, 13:20  doi:10.1186/1471-2474-13-20

Published: 16 February 2012

Abstract

Background

The objective of the study was to standardize a method using digital photographs to diagnose and grade hand osteoarthritis (HOA), to compare it with radiographs and clinical examination with regard to prevalence and relation to symptoms, and finally to construct a simple shortened version suitable for use in very large studies, where a global estimate may be preferable.

Methods

High quality photographs with standard distance and hand positioning were analysed for the presence of HOA and subsequently compared with standard radiographs and clinical examination in 381 random participants in the AGES-Reykjavik Study, a large population study. The mean age of the participants was 76 years.

Results

Using the photographic method, the most commonly affected joints were the second DIP joints followed by the third DIP joints and second and third PIP joints. Both interobserver (ICC = 0.83) and intraobserver reading agreements (ICC = 0.89) were acceptable. On comparison with radiography and clinical examination, aggregate scores were significantly correlated (Rs 0.35-0.69), more so in females (Rs 0.53-0.72) than males. Hand pain in males showed very little association with HOA findings by the three methods but all methods showed a comparable moderate association with hand pain in females. The performance of photography in predicting pain on most days for at least a month in females was comparable to that of radiography and clinical examination (AUC 0.63 p = 0.004). Analysis of intermittent pain yielded similar results for in the DIP and PIP joints (OR 3.2-3.3, p < 0.01), but for the CMC1 joints, both radiography (OR 9.0, p < 0.0001), and clinical examination (OR 9.8, p < 0.0001), had higher predictive odds ratios for pain than photography (OR 3.6, p < 0.0001)., A shortened, rapidly performed form of reading photographs also showed a high degree of correlation with the other methods (Rs 0.56-0.82).

Conclusion

High quality hand photographs can be used to diagnose and grade hand osteoarthritis. The method has the advantage of being inexpensive and easy to perform. By using a slightly simplified method of reading, it appears to be highly suitable for use in large studies.

Keywords:
Hand ostearthritis; Generalized osteoarthritis; Epidemiology; Imaging; Photography