Table 3.

Mean differences for age on MDAS scores at pre-treatment (N = 81)

Age	N	Mean	s.d.	Lower bound 95% confidence interval	Upper bound 95% confidence interval
Under 30 years	20	12.15	5.47	9.58	14.71
31–50 years	36	11.80	5.26	10.02	13.58
51 plus years	43	9.34	4.57	7.94	10.75