TABLE 2.

Parameter Estimates for Psychiatric Phenotype Caffeine Use

	Psychiatric disorder A	Psychiatric disorder E	Caf. A	Caf. E	Genetic correlation	Environmental correlation
GAD	0.33 (0.20–0.45)	0.67 (0.55–0.80)	0.49 (0.42–0.55)	0.51 (0.45–0.58)	0.48 (0.28–0.70)	0.04 (−0.09–0.16)
PAN	0.32 (0.14–0.49)	0.68 (0.51–0.87)	0.49 (0.42–0.56)	0.51 (0.44–0.58)	−0.22 (−0.51–0.03)	0.11 (−0.05–0.27)
PHO	0.32 (0.20–0.43)	0.68 (0.57–0.80)	0.49 (0.42–0.56)	0.51 (0.44–0.58)	0.25 (0.06–0.45)	−0.01 (−0.13–0.11)
MDD	0.38 (0.27–0.49)	0.62 (0.51–0.73)	0.49 (0.42–0.55)	0.51 (0.45–0.58)	0.38 (0.21–0.55)	0.12 (0.00–0.24)
AN	0.34 (0.02–0.61)	0.66 (0.40–0.98)	0.49 (0.42–0.56)	0.51 (0.45–0.58)	0.07 (−0.30–0.54)	−0.03 (−0.26–0.20)
BN	0.50 (0.28–0.68)	0.50 (0.32–0.72)	0.49 (0.42–0.56)	0.51 (0.46–0.58)	0.08 (−0.15–0.33)	0.07 (−0.16–0.28)

Note: Common environmental parameter fixed to zero. Caf. = caffeine use; GAD = generalized anxiety disorder; PAN = panic disorder; PHO = phobia; MDD = major depressive disorder; AN = anorexia nervosa; BN = bulimia nervosa; A = genetic parameter; E = unique environmental parameter.