Table 3.

Magnitude and origin of genetic, shared environmental and individual-specific environmental effects for five anxiety disorders from the best-fit common factor model

	Standardised variance estimates
	Genetic		Shared environment		Individual-specific environment
	Common	Specific	Common	Specific	Common	Specific
Panic disorder
Variancea	0.30 (91%)	0.03 (9%)	0.03 (100%)	0.00 (0%)	0.22 (34%)	0.42 (66%)
95% CIb	0.10–0.42	0.00–0.14	0.00–0.13	0.00–0.09	0.20–0.30	0.30–0.49
Generalised anxiety disorder
Variance	0.26 (96%)	0.01 (4%)	0.03 (27%)	0.08 (73%)	0.17 (28%)	0.44 (72%)
95% CI	0.19–0.36	0.00–0.20	0.00–0.17	0.00–0.18	0.12–0.20	0.32–0.56
Phobias
Variance	0.24 (60%)	0.16 (40%)	0.03 (100%)	0.00 (0%)	0.18 (31%)	0.40 (69%)
95% CI	0.02–0.24	0.00–0.15	0.00–0.13	0.13–0.24	0.35–0.49	0.08–0.33
Obsessive–compulsive disorder
Variance	0.16 (55%)	0.13(45%)	0.02 (17%)	0.10 (83%)	0.11 (18%)	0.49 (82%)
95% CI	0.05–0.22	0.00–0.42	0.00–0.10	0.00–0.21	0.07–0.16	0.35–0.64
Post-traumatic stress disorder
Variance	0.16 (70%)	0.07 (30%)	0.02 (25%)	0.06 (75%)	0.12 (17%)	0.58 (83%)
95% CI	0.08–0.24	0.00–0.36	0.00–0.09	0.00–0.17	0.09–0.17	0.44–0.73

^aPercentages in parentheses are proportions of common and specific variance for each major type of effect (genetic, shared environmental and individual-specific environmental).

^bConfidence intervals are approximate.