Table 2. NIPPON DATA80 FFQ vs NNSJ80 estimates on fish intake in 5231 women and 4129 men.

Women NNSJ_est range (g)	FFQ (fish)					Total	Men NNSJ_est range (g)	FFQ (fish)					Total
	1	2	3	4	5			1	2	3	4	5
1 189.2–505.0	41	87	49	57	6	240	1 221.0–792.8	57	133	71	43	8	312
	0.78	1.66	0.94	1.09	0.11	4.6		1.38	3.22	1.72	1.04	0.19	7.6
2 105.8–189.0	110	627	494	344	31	1606	2 124.6–220.8	149	596	398	255	29	1427
	2.1	12.0	9.4	6.6	0.6	30.7		3.6	14.4	9.6	6.2	0.7	34.6
3 68.9–105.7	67	558	579	485	49	1738	3 81.8–124.5	83	422	451	322	30	1308
	1.3	10.7	11.1	9.3	0.9	33.2		2.01	10.22	10.92	7.8	0.73	31.7
4 26.8–68.8	21	309	573	523	59	1485	4 33.6–81.7	23	256	363	281	39	962
0.4	5.9	11.0	10.0	1.1	28.4	0.56	6.2	8.79	6.81	0.94	23.3
5 0–26.7	1	28	39	76	18	162	5 0–33.3	2	18	23	63	14	120
	0.02	0.54	0.75	1.45	0.34	3.1		0.05	0.44	0.56	1.53	0.34	2.9
Total	240	1609	1734	1485	163	5231	Total	314	1425	1306	964	120	4129
	4.6	30.8	33.2	28.4	3.1	100		7.6	34.5	31.6	23.4	2.9	100

Cross table for comparing NIPPON DATA80 food frequency questionnaires (FFQ) data on fish intake and re-categorized NNSJ80 data on fish intake (categories and ranges in g/day) to correspond to NIPPON DATA80 FFQ categories. FFQ (fish) 1 to 5 correspond to fish consumption ≥ twice/day, about once/day, about once/2 days, about 1 to 2 times/week, and less than once/week, respectively. Upper datum in each cell is frequency and lower one in italic is percentage of total.

NNSJ_est = estimated data from the National Nutrition Survey.