Similarly , the mean adjusted Oswestry Disability Index score was 35.95 points ( 95 % confidence interval , 25.42 to 46.47 points ) in the no-brace group and 33.54 points ( 95 % confidence interval , 23.79 to 43.29 points ) in the rigid-brace group , with a difference of 2.41 points ( 95 % confidence interval , -7.86 to 9.27 points ) between the groups .