Table 2

Association between four different measures of total alcohol intake during pregnancy (drinks/week): diary, interview_a (average/week), interview₇ (past week), and questionnaire (average/week). Aarhus, Denmark, 1998

		Diary (drinks/week)		Total
		0	<1	Total		1	2	3–4	5–9	10–14	Missing
Interview_a(drinks/week)
0	92	29	3	0	1	0	0	4	129
<1	18	35	22	19	9	1	0	0	104
1	11	19	20	27	6	2	0	1	86
2	6	20	14	24	10	2	0	0	76
3–4	0	2	2	12	16	4	0	2	38
5–9	0	0	0	1	2	2	1	0	6
10–14	0	0	0	0	0	0	0	0	0
Missing	0	1	1	0	0	0	0	0	2
Total	127	106	62	83	44	11	1	7	441

Interview₇(drinks/week)
0	113	50	25	23	13	2	0	4	230
<1	7	11	5	6	2	0	0	0	31
1	4	27	20	32	8	3	0	2	96
2	2	13	7	12	12	3	0	0	49
3–4	1	4	4	9	7	2	1	1	29
5–9	0	0	0	1	2	1	0	0	4
10–14	0	0	0	0	0	0	0	0	0
Missing	0	1	1	0	0	0	0	0	2
Total	127	106	62	83	44	11	1	7	441

Questionnaire (drinks/week)
0	79	20	6	2	4	0	0	2	113
<1	36	62	39	42	9	3	0	0	191
1	3	11	8	19	14	1	0	1	57
2	2	3	6	12	8	2	0	1	34
3–4	0	2	0	2	7	4	1	1	17
5–9	1	0	0	0	0	0	0	0	1
10–14	0	0	0	0	0	0	0	0	0
Missing	6	8	3	6	2	1	0	2	28
Total	127	106	62	83	44	11	1	7	441
	Interview_a(drinks/week)
	0	<1	1	2	3–4	5–9	Missing	Total
Interview₇(drinks/week)
0	119	59	31	16	5	0	0	230
<1	3	17	5	4	2	0	0	31
1	4	23	34	25	8	2	0	96
2	1	4	12	21	11	0	0	49
3–4	2	1	3	9	11	3	0	29
5–9	0	0	1	1	1	1	0	4
Missing	0	0	0	0	0	0	2	2
Total	129	104	86	76	38	6	2	441

Questionnaire (drinks/week)
0	87	18	4	3	0	0	1	113
<1	31	60	54	40	4	1	1	191
1	1	13	18	14	11	0	0	57
2	2	3	4	12	12	1	0	34
3–4	0	1	1	2	9	4	0	17
5–9	1	0	0	0	0	0	0	1
Missing	7	9	5	5	2	0	0	28
Total	129	104	86	76	38	6	2	441
	Interview₇(drinks/week)
	0	<1	1	2	3–4	5–9	Missing	Total
Questionnaire (drinks/week)
0	95	6	8	2	1	0	1	113
<1	94	14	49	22	10	1	1	191
1	18	4	18	12	4	1	0	57
2	7	4	8	6	7	2	0	34
3–4	1	0	5	5	6	0	0	17
5–9	1	0	0	0	0	0	0	1
Missing	14	3	8	2	1	0	0	28
Total	230	31	96	49	29	4	2	441