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Table 3 Correlations between change in photographic hand score and change in (i) radiographic score and (ii) number of clinical features between baseline and 7 years by joint and joint group

From: Longitudinal validity of using digital hand photographs for assessing hand osteoarthritis progression over 7 years in community-dwelling older adults with hand pain

  Change in photographic hand OA with change in radiographic OA Change in photographic hand OA with change in the number of clinical features
n* Rho (p value) n* Rho (p value)
Left DIP2 231 0.138 (p = 0.036) 228 0.032 (p = 0.627)
DIP3 234 0.202 (p = 0.002) 243 0.161 (p = 0.012)
PIP2 244 0.198 (p = 0.002) 250 0.116 (p = 0.066)
PIP3 236 −0.089 (p = 0.171) 243 0.076 (p = 0.239)
1CMC 191 0.130 (p = 0.072) 189 0.094 (p = 0.197) †
Right DIP2 216 −0.066 (p = 0.337) 214 0.097 (p = 0.155)
DIP3 228 0.070 (p = 0.294) 231 0.092 (p = 0.164)
PIP2 236 0.134 (p = 0.039) 242 0.023 (p = 0.717)
PIP3 231 −0.019 (p = 0.773) 235 0.138 (p = 0.035)
1CMC 182 0.102 (p = 0.170) 177 0.063 (p = 0.405) †
Joint group DIPs 205 0.109 (p = 0.119) 201 0.109 (p = 0.124)
PIPs 226 0.143 (p = 0.032) 228 0.241 (p < 0.001)
1CMCs 162 0.107 (p = 0.176) 161 0.042 (p = 0.596) †
  1. * Study population n = 253 but individuals were excluded from analyses if at baseline they had the maximum score in a joint for either construct. † Change in the number of clinical features were − 2 to 2 as only two clinical features for the thumb were assessed at baseline (deformity, joint enlargement). Correlations presented are Spearman Rank correlation coefficients. DIP, Distal Interphalangeal joint; PIP, Proximal Interphalangeal joint; 1CMC, 1st Carpometacarpal joint