Table 7.

Crude and adjusted^* odds ratios (95% CI) for low birth weight, preterm delivery, and intrauterine growth retardation according to fish intake (n=1159). The highest intake group (FREQ3) is used as reference

Group†	Low birth weight	Preterm delivery	Intrauterine growth retardation
FREQ0:
Crude	4.06 (1.34 to 12.01)	3.79 (1.26 to 11.38)	1.28 (0.61 to 2.71)
Adjusted	3.57 (1.14 to 11.14)	3.60 (1.15 to 11.20)	1.01 (0.45 to 2.26)
FREQ1:
Crude	1.60 (0.49 to 5.27)	2.34 (0.75 to 7.30)	1.44 (0.70 to 2.96)
Adjusted	1.39 (0.41 to 4.67)	2.09 (0.66 to 6.62)	1.26 (0.59 to 2.66)
FREQ2:
Crude	1.26 (0.40 to 3.96)	1.59 (0.52 to 4.85)	1.01 (0.51 to 2.03)
Adjusted	1.25 (0.39 to 3.94)	1.58 (0.52 to 4.83)	1.02 (0.50 to 2.08)
FREQ3:
Reference	1.00	1.00	1.00
Statistical tests (dietary variable modelled as three indicator variables)
Crude (P value)	0.004	0.03	0.5
Adjusted (P value)	0.02	0.06	0.8

^*Adjusted for maternal smoking, alcohol consumption, age, parity, height, pre-pregnant weight, length of education, and cohabitant status (see text). 

^†See text and table 5 for definitions of comparison groups.