Table 1.

The assumptions and parameters in the simulations

	Assumptions
1	Equal prevalence rates for the input symptoms of the same diagnosis; presence of input symptoms assigned randomly
2	Same correlations between the input symptoms of the diagnoses of major depressive episodes and dysthymic disorder; same correlations between the input symptoms of manic episodes
3	The input symptoms of manic episodes created independent of those of major depressive episodes and dysthymic disorder
4	Diagnoses made accurately based on the diagnostic criteria and symptoms reported precisely by patients
	Parameters of input symptoms of the same diagnosis for each simulation
1	Population sizes	100 000
2	Prevalence rates (uniform for all input symptoms in a simulation)	0.05, 0.1, 0.3, 0.5 and 0.7
3	Correlations (uniform between all input symptoms of the same diagnosis in a simulation)	0, 0.1, 0.4, 0.7 and 0.9
4	Number of simulations for each combination of the assumed prevalence rates and between-variable correlations of the input symptoms	100