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. 2006 Feb 27;65(9):1131–1138. doi: 10.1136/ard.2005.048165

Table 1 Summary of the subjects available for each of the analyses.

Total ASP analyses Quantitative analyses
Nodal OA Nodal+x ray U‐DIP DIP U‐JSN JSN U‐OST OST
People 558 484 310 558 484 354 231 354 295
Women 443 412 260 443 412 296 202 296 243
Men 115 72 50 115 72 58 29 58 52
Families 202 195 108 202 195 128 70 128 100

ASP, affected sibling pair; DIP, distal interphalangeal; JSN, joint‐space narrowing; OA, osteoarthritis; OST, osteophyte; U‐DIP, unaffected and distal interphalangeal; U‐JSN, unaffected and joint‐space narrowing; U‐OST, unaffected and osteophyte.