INS and diabetes mellitus: Education X2(3) =25.9, P < 0.001; occupation X2(4) =23.2, P < 0.001; duration of insulin therapy X2(3) =15.9, P = 0.001; duration of diabetes X2(3) =8.6, P = 0.036; and patients knowledge levels X2(2) =19.3, P < 0.001 were significantly alter the patients’ practice levels.