Based on 8 RCT’s of fair quality (New York 1963, Malmo I and II, Two County 1978, Canada 1980, Stockholm 1980, Göteborg 1982, UK AGE trial 1991) Based on 8 RCT’s ; 4 adequately randomised ( A.R) : Canada 1980 a and b, Malmo I and UK AGE trial 1991, 4 suboptimally randomised (Sub.R) : New York 1963, Two County 1978, Stockholm 1980, Göteborg 1982
trial 1991) Based on 8 RCT’s ; 4 adequately randomised ( A.R) : Canada 1980 a and b, Malmo I and UK AGE trial 1991, 4 suboptimally randomised (Sub.R) : New York 1963, Two County 1978, Stockholm 1980, Göteborg 1982
