Table 2.

The estimated mean SCAS scores for boys and girls, and for each school, at the three time points

	Time point	Estimated mean	Standard error	95% Confidence interval
				Lower limit	Upper limit
Gender
Boys (n = 66)	Pre	22.24	2.26	17.78	26.69
	Post	20.54	2.33	15.94	25.13
	Follow-up	15.85	2.35	11.22	20.48
Girls (n = 89)	Pre	31.71	1.97	27.83	35.60
	Post	34.55	2.01	30.59	38.50
	Follow-up	31.19	2.03	27.20	35.19
School
A (n = 28)	Pre	27.86	3.94	20.09	35.62
	Post	35.41	4.08	27.38	43.44
	Follow-up	28.30	4.08	20.27	36.33
B (n = 136)	Pre	27.67	1.78	24.16	31.17
	Post	27.61	1.81	24.04	31.17
	Follow-up	24.53	1.83	20.93	28.13