“…Mcintosh arthroplasty in the Lund material resulted in 23 knees (34 %) with "satisfactory" and 44 (66 %) with "not satisfactory" results, using the Weinfeld point system at followup after an observation period of, on average, 3.3 years. On the basis of 10 published materials (Andersson et cl , 1973, Blum et ol , 1974, Conaty 1974, Hastings and Hewitson 1973, Mcintosh and Hunter 1972, Jani and Morscher 1973, Jessop and Moor 1972, Neville and M.artins 1972, Potter 1969, and Schorn et al 1977) the frequency of good or excellent results in a total of 553 knees in patients with rheumatoid arthritis can be calculated at 57 % (38-82 %) with average observation periods of 1.6-4.0 years. To compare different populations with different evaluation systems is of doubtful value, however (Andersson 1972).…”