TABLE 2.

Risk of spontaneous PTD according to no versus any food intake¹

			Crude model		Adjusted model2
	Spontaneous PTD (n = 950)	Term controls (n = 17,938)	P value	Crude OR (95% CI)	P value	Adjusted OR (95% CI)
	n
Dried fruit
No	460	7363	<0.001	0.74 (0.65, 0.85)	0.005	0.82 (0.72, 0.94)
Yes	490	10,575
Raisins
No	503	8372	<0.001	0.78 (0.68, 0.89)	0.017	0.85 (0.72, 0.97)
Yes	447	9566
Apricots
No	823	15,154	0.074	0.84 (0.69, 1.02)	0.220	0.88 (0.73, 1.08)
Yes	127	2784
Prunes, figs, dates
No	765	14,147	0.221	0.90 (0.77, 1.06)	0.356	0.92 (0.78, 1.09)
Yes	185	3791
Alliums
No	105	1823	0.377	0.91 (0.74, 1.12)	0.780	0.97 (0.78, 1.20)
Yes	845	16,115
Alliums3
Low	498	8520	0.003	0.82 (0.72, 0.94)	0.005	0.82 (0.72, 0.94)
High	452	9418
Garlic
No	267	4360	0.008	0.82 (0.71, 0.95)	0.011	0.82 (0.71, 0.96)
Yes	683	13,578
Onions, raw
No	288	5470	0.907	1.01 (0.88, 1.16)	0.869	1.01 (0.88, 1.17)
Yes	662	12,468
Onions, cooked
No	128	2135	0.146	0.87 (0.72, 1.05)	0.634	0.95 (0.78, 1.16)
Yes	822	15,803

¹PTD, preterm delivery.

²Adjusted for parity, fetal sex, prepregnancy BMI, previous spontaneous PTD, marital status, smoking before pregnancy, smoking during pregnancy, educational level, alcohol, family income, and maternal age.

³Adjusted lower threshold: low ≤ median, high > median, median = 5.84; performed due to the low number of participants in the no-intake group.