Table 2.

Agreement between twin report and parent self-report and between twin report and coparent report for narrow versus broad ratings of parental alcohol problems.

	Na		Narrow rating				Broad rating
			EA twins		AA twins		EA twins		AA twins
	EA	AA	ρ	S.E.	ρ	S.E.	ρ	S.E.	ρ	S.E.
Paternal alcohol problems
Self-report:
Alcohol dependence	1667–1971	158–159	0.54	0.06	0.46	0.19	0.54	0.05	0.50	0.17
3+ dependence symptomsb	1667–1971	158–159	0.62	0.04	0.45	0.17	0.63	0.04	0.52	0.14
Alcohol abuse	1667–1971	158–159	0.18	0.06	0.12	0.19	0.21	0.05	0.09	0.19
Mother report:
3+ dependence symptomsb	2594–2604	331–332	0.80	0.02	0.46***	0.12	0.81	0.02	0.56***	0.10
Excessive drinking screen	2574–2584	325–326	0.78	0.02	0.47***	0.10	0.79	0.02	0.62***	0.08
Alcohol abuse	2594–2604	331–332	0.005	0.06	−0.02	0.13	0.06	0.05	0.14	0.12
Maternal alcohol problems
Self-report:
Alcohol dependence	2638–2640	352	0.69	0.05	0.64	0.16	0.69	0.05	0.52	0.17
3+ dependence symptomsb	2638–2640	352	0.67	0.05	0.46*	0.18	0.66	0.05	0.47*	0.15
Alcohol abuse	2638–2640	352	0.20	0.08	0.05	0.15	0.18	0.08	0.40	0.18
Father report:
3+ dependence symptomsb	1969–1971	160	0.70	0.07	--#	--	0.65	0.07	--#	--
Excessive drinking screen	1963–1965	158	0.71	0.06	0.38	0.18	0.68	0.06	0.58	0.18
Alcohol abuse	1969–1971	160	0.44	0.10	0.23	0.19	0.46	0.09	0.41	0.16

ρ = tetrachoric correlation; SE = standard error;

^aNs for narrow-broad ratings;

^bwithout clustering criterion;

^# cases where no inter-rater agreement was observed;

^*EA>AA agreement, p < .05;

^***EA>AA agreement, p < .001.