Appendix Table C.

Tetrachoric correlations among mental disorder categories in respondents of National Comorbidity Survey and National Comorbidity Survey follow-up according to student status at T1.

Mental disorders	Bipolar disorder	Any fear disorder	Any anxiety- misery disorder	Any externalizing disorder
Students -Model 1a
Bipolar disorder	1.00	.	.	.
Any fear disorder	0.98	1.00	.	.
Any anxiety-misery disorder	0.11	0.41	1.00	.
Any externalizing disorder	0.53	0.41	0.31	1.00
Students-Model 2b
Bipolar disorder	1.00	.	.	.
Any fear disorder	0.30	1.00	.	.
Any anxiety-misery disorder	0.56	0.42	1.00	.
Any externalizing disorder	0.16	0.39	0.41	1.00
Students-Model 3c
Bipolar disorder	1.00	.	.	.
Any fear disorder	0.22	1.00	.	.
Any anxiety-misery disorder	0.62	0.36	1.00	.
Any externalizing disorder	−0.04	0.23	0.24	1.00
Non-students-Model 1d
Bipolar disorder	1.00	.	.	.
Any fear disorder	0.40	1.00	.	.
Any anxiety-misery disorder	0.30	0.46	1.00	.
Any externalizing disorder	0.72	0.34	0.29	1.00
Non-students-Model 2e
Bipolar disorder	1.00	.	.	.
Any fear disorder	0.45	1.00	.	.
Any anxiety-misery disorder	0.45	0.45	1.00	.
Any externalizing disorder	0.41	0.23	0.29	1.00
Non-students-Model 3f
Bipolar disorder	1.00	.	.	.
Any fear disorder	0.48	1.00	.	.
Any anxiety-misery disorder	0.27	0.49	1.00	.
Any externalizing disorder	0.37	0.24	0.29	1.00

Note: T1 represents the baseline National Comorbidity Survey conducted in 1990–1992 and T2, the National Comorbidity Survey-2 conducted in 2001–2003.

^a. Students with 7–11 years of education at T1.

^b. Students with 7–12 years of education at T1 and ≥12 years of education at T2.

^c. Students with 7–15 years of education at T1 and ≥13 years of education of education at T2.

^d. Non-student respondents with <12 years of education at T1.

^e. Non-student respondents with ≤12 years of education at T1 and ≥12 years of education at T2.

^f. Non-student respondents with ≤15 years of education at T1 and ≥13 years of education at T2.