. Author manuscript; available in PMC: 2011 Dec 6.

Published in final edited form as: Twin Res Hum Genet. 2009 Oct;12(5):469–488. doi: 10.1375/twin.12.5.469

Table 4.

Logistic Regressions Predicting Depression (Lifetime and Before12RP) From Kessler Perceived Social Support (KPSS), Personal Stressful Life Events (SLE) and the Interaction Between SLE and KPSS

	N	Full model		Sex		Age		KPSS				Personal SLE				KPSS × ⍰SLE
		-2ΔLL		Wald		Wald		Wald		-2ΔLL		Wald		-2ΔLL		Wald		-2ΔLL

		Δ χ ²₅	p	OR	p	OR	p	OR	p	Δ χ²₁	p	OR	p	Δ χ²₁	p	OR	p	Δ	p
Major Depression (MD)

	Lifetime depression

M	7523	263.10	.000**	1.49	.000**	0.94	.053	0.88	.000	32.68	.000**	1.53	.000	185.18	.000**	1.05	.109	2.58	.108
M	2750	54.86	.000**			1.03	.670	0.87	.012	10.09	.001**	1.41	.000	42.66	.000**	1.06	.246	1.35	.245
F	4773	193.88	.000**			0.90	.012*	0.89	.004	23.35	.000**	1.61	.000	149.96	.000**	1.03	.491	0.47	.491

	Onset before 12mth SLE reporting period (Before12RP)

M	6850	177.98	.000**	1.45	.000**	1.23	.000**	0.87	.001	23.93	.000**	1.60	.000	130.09	.000**	1.06	.102	2.68	.102
M	2548	54.46	.000**			1.40	.000**	0.85	.035	6.75	.009*	1.52	.000	35.04	.000**	1.10	.132	2.30	.129
F	4302	118.90	.000**			1.16	.003**	0.88	.010	17.86	.000**	1.66	.000	98.82	.000**	1.03	.468	0.53	.468

Sub-Clinical Depression (SCD)

	Lifetime depression

M	7322	401.62	.000**	1.31	.000**	0.88	.000**	0.89	.000	47.05	.000**	1.60	.000	284.20	.000**	1.02	.404	0.69	.405
M	2679	108.32	.000**			0.89	.015*	0.91	.020	11.36	.001**	1.47	.000	79.51	.000**	1.00	.914	0.01	.914
F	4643	285.85	.000**			0.88	.000**	0.89	.000	36.62	.000**	1.69	.000	210.50	.000**	1.02	.565	0.33	.566

	Onset before 12mth SLE reporting period (Before12RP)

M	6142	298.99	.000**	1.29	.000**	1.14	.000**	0.88	.000	38.66	.000**	1.71	.000	246.99	.000**	1.05	.118	2.43	.119
M	2278	74.48	.000**			1.12	.046	0.89	.039	8.33	.004**	1.55	.000	65.43	.000**	1.04	.451	0.57	.451
F	3864	221.02	.000**			1.15	.001**	0.87	.001	31.22	.000**	1.83	.000	187.75	.000**	1.04	.318	0.99	.321

Note. p: ‘.000’ = ‘<.001’; For males M females (M & F), p < .050 (*) were significant at α = .050 and p < .010 (**) were significant at α = .010; For M or F, we used a Bonferonni correction (p/2), so p < .025 (*) were significant at α = .050 and p < .005 (**) were significant at α = .010.