Work, leisure time, walking, moderate-to-vigorous and total physical activity are inversely associated with thumb osteoarthritis in the osteoarthritis initiative. (April 2017) - Eaton, C.B.; Schafer, L.; Duryea, J.; Driban, J.B.; Lo, G.H.; Roberts, M.B.; Haugen, I.K.; Lu, B.; McAlindon, T.A.