Table 3.

Minimum detectable effect sizes for a two-sample means t-test given power, unbalanced samples, control mean, equal variance and significance level set to 5%.

Panel A. Adult Psychological Distress
Significance level	Power	Control sample	Sanctuary sample	Mean	Standard deviation	Minimum detectable effect
0.05	0.8	98051	43766	3.4	3.9	0.0628
0.05	0.9	98051	43766	3.4	3.9	0.0727
0.05	0.95	98051	43766	3.4	3.9	0.0808
Panel B. Adolescent Psychological Distress
Significance level	Power	Control sample	Sanctuary sample	Control mean	Control sample standard deviation	Sanctuary sample standard deviation	Minimum detectable effect
0.05	0.8	4529	1894	4.23	3.69	3.48	0.2717
0.05	0.9	4529	1894	4.23	3.69	3.48	0.3144
0.05	0.95	4529	1894	4.23	3.69	3.48	0.3496