Effectiveness of an intervention for reducing social stigma towards mental illness in adolescents

Table 1 Mean scores of the Community Attitudes towards Mental Illness subscales and comparison of the differences in the averages of the control and intervention groups

	Baseline		Post-intervention		Difference between baseline and post-intervention		T-students	P value
	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)
	Control	Intervention	Control	Intervention	Control	Intervention
Authoritarianism	26.61 (3.23)	27.26 (3.75)	26.79 (3.98)	25.32 (4.09)	-0.30 (2.83)	1.94 (4.03)	5.186	0.000
Benevolence	21.74 (4.00)	21.98 (4.08)	22.14 (4.28)	22.14 (4.13)	-0.27 (2.91)	-0.14 (3.55)	0.330	0.742
Social restrictiveness	20.89 (4.51)	20.07 (4.10)	22.14 (5.16)	20.34 (4.33)	-1.25 (3.79)	-0.20 (3.49)	2.355	0.019
Community mental health ideology	24.43 (5.20)	23.00 (5.22)	24.79 (5.60)	22.53 (5.52)	-0.37 (3.55)	0.40 (4.40)	1.572	0.117

Table 2 Mean scores of the Community Attitudes towards Mental Illness subscales comparing the differences between boys and girls at baseline moment

	Baseline		T-students	P value
	Mean (SD)	Mean (SD)
	Girls	Boys
Authoritarianism	25.96 (3.26)	27.92 (3.45)	4.824	0.000
Benevolence	21.11 (3.45)	22.62 (4.46)	3.121	0.002
Social restrictiveness	19.91 (4.11)	21.14 (4.50)	2.352	0.019
Community mental health ideology	22.97 (4.72)	24.56 (5.65)	2.504	0.013

Table 3 Mean scores of the Community Attitudes towards Mental Illness subscales comparing the differences between knew someone or not at baseline moment

	Baseline		T-students	P value
	Mean (SD)	Mean (SD)
	Knows someone	Does not know anyone
Authoritarianism	26.48 (3.33)	27.74 (3.66)	-2.847	0.005
Benevolence	21.53 (4.06)	22.50 (3.91)	-1.887	0.060
Social restrictiveness	19.86 (4.21)	21.81 (4.32)	-3.594	0.000
Community mental health ideology	23.37 (5.27)	24.60 (5.14)	-1.811	0.071

Table 4 Mean scores of the Community Attitudes towards Mental Illness subscales and comparison of the differences in the averages of the control and intervention groups by gender

		Baseline		Post-intervention		Difference between baseline and post-intervention		T-students	P value
		Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)
		Control	Intervention	Control	Intervention	Control	Intervention
Boys	Authoritarianism	27.44 (3.12)	28.50 (3.77)	28.04 (4.31)	26.18 (4.16)	-0.74 (3.12)	2.27 (3.93)	4.771	0.000
	Benevolence	22.33 (4.40)	22.95 (4.54)	22.93 (4.95)	22.76 (4.51)	-0.34 (3.12)	0.19 (3.61)	0.901	0.369
	Social restrictiveness	21.45 (4.61)	20.77 (4.39)	23.06 (5.78)	21.65 (4.34)	-1.64 (4.06)	-0.63 (3.97)	1.432	0.154
	Community mental health ideology	25.04 (5.82)	23.98 (5.43)	25.99 (6.20)	23.89 (5.57)	-0.87 (3.81)	0.32 (5.40)	1.477	0.142
Girls	Authoritarianism	25.80 (3.14)	26.14 (3.41)	25.58 (3.23)	24.51 (3.92)	0.12 (2.47)	1.67 (4.14)	2.617	0.010
	Benevolence	21.19 (3.53)	21.02 (3.38)	21.40 (3.41)	21.51 (3.69)	-0.21 (2.63)	-0.45 (3.52)	-0.473	0.637
	Social restrictiveness	20.35 (4.37)	19.36 (3.73)	21.26 (4.36)	19.08 (3.99)	-0.88 (3.50)	0.30 (2.91)	2.106	0.037
	Community mental health ideology	23.82 (4.45)	21.97 (4.86)	23.65 (4.74)	21.17 (5.17)	0.13 (3.22)	0.49 (3.23)	0.649	0.518

Table 5 Mean scores of the Community Attitudes towards Mental Illness subscales and comparison of the differences in the averages of the control and intervention groups according to whether or not they knew someone with mental illness

		Baseline		Post-intervention		Difference between baseline and post-intervention		T-students	P value
		Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)
		Control	Intervention	Control	Intervention	Control	Intervention
Knows someone	Authoritarianism	25.97 (3.27)	26.88 (3.39)	26.43 (4.06)	24.98 (4.14)	-0.47 (3.01)	1.905 (4.01)	4.511	0.000
	Benevolence	21.53 (4.31)	21.62 (3.92)	21.89 (4.3)	21.61 (4.28)	-0.36 (2.98)	0.01 (3.51)	0.571	0.569
	Social restrictiveness	20.19 (4.42)	19.57 (3.96)	21.81 (5.44)	19.81 (4.52)	-1.62 (3.92)	-0.24 (3.57)	2.388	0.018
	Community mental health ideology	24.24 (5.48)	22.49 (4.9)	24.5 (5.80)	22.03 (5.57)	-0.26 (3.35)	0.46 (4.37)	1.039	0.300
Does not know anyone	Authoritarianism	27.35 (3.13)	28.52 (4.38)	27.3 (3.80)	26.61 (4.07)	0.05 (2.68)	1.91 (4.24)	2.679	0.010
	Benevolence	22.2 (3.61)	23.06 (4.36)	22.48 (4.24)	23.67 (3.28)	-0.28 (2.99)	-0.61 (3.63)	-0.437	0.663
	Social restrictiveness	21.93 (4.47)	21.52 (4.03)	22.83 (4.75)	21.82 (3.26)	-0.9 (3.7)	-0.30 (3.39)	0.783	0.435
	Community mental health ideology	24.7 (4.6)	24.27 (5.82)	25.32 (5.16)	24 (5.29)	-0.62 (3.72)	0.27 (4.81)	1.114	0.268