Table 1.

Descriptive Statistics for Five Analyzed Phenotypes

(sample sizes, means and standard deviations for continuous variables: height and body mass index; sample sizes and percentages per category for categorical variables: smoking status, church attendance and political affiliation)

	Height			Body mass index			Smoking status
	N	Mean	SDev	N	Mean	SDev	N	% 0	% 1
Male twin	5270	17.81	0.71	5243	32.14	1.37	5207	36.78	63.22
Female twin	9342	16.3	0.65	9271	31.55	1.75	9102	56.04	43.96
Father	841	17.84	0.68	837	32.6	1.29	888	20.83	79.17
Mother	1350	16.35	0.64	1336	32.22	1.79	1379	52.94	47.06
Brother	1177	17.94	0.67	1177	32.33	1.29	1199	35.11	64.89
Sister	1774	16.43	0.64	1753	31.77	1.82	1788	55.43	44.57
Husband	2465	17.85	0.68	2454	32.48	1.34	2486	30.17	69.83
Wife	1817	16.35	0.64	1796	31.75	1.69	1832	56.17	43.83
Son	1820	18.07	0.69	1818	32.22	1.38	1816	50.06	49.94
Daughter	2739	16.57	0.64	2718	31.43	1.85	2735	54.63	45.37

	Church attendance							Political affiliation
	N	% 0	% 1	% 2	% 3	% 4	% 5	N	% 0	% 1	% 2	% 3	% 4
Male twin	5233	14	25	11	19	23	8.2	5135	13	7.1	42	12	25
Female twin	9256	17	32	11	16	17	6.8	8939	13	10	44	13	20
Father	840	14	30	11	17	21	6.3	859	15	6.3	40	14	26
Mother	1332	17	37	11	16	15	4.4	1361	14	8	45	11.2	22
Brother	1211	12	25	11.2	19	24	9.2	1188	9.4	5.7	46	14	25
Sister	1808	17	30	11.6	19	16	6.2	1770	11	8.2	50	11.2	20
Husband	2455	14	29	11	16	21	8.4	2419	14	7.2	39	11.2	29
Wife	1844	19	33	11.7	15	16	5.6	1807	14	7.7	42	13	24
Son	1817	8.4	19	11.2	21	25	15	1822	8.7	8.7	47	13	22
Daughter	2732	11.6	26	11.4	19	21	11	2711	11.1	10	51	13	14