Table 3.

Factors associated with the use of folic acid supplementation among women reporting at least one pregnancy and having taken or not folic acid supplementation (excluding “I don’t remember”) (n = 708), Rennes, France, 2019.

	Folic acid supplementation use (n = 515)	No folic acid supplementation use (n = 193)	Crude OR [95 %CI]	P	Adjusted ORb [95 %CI]	P
Age at the last pregnancy, year				0.041		0.049
<= 25	16 (3.1)	13 (6.7)	0.41 [0.19–0.88]		0.47 [0.18–1.19]
25–35	381 (74.0)	128 (66.3)	Ref.		Ref.
>=35	118 (22.9)	52 (26.9)	0.76 [0.52–1.12]		0.63 [0.41–0.98]
Level of education				<0.001		0.041
Primary or secondary school	12 (2.3)	19 (9.8)	Ref.		Ref.
High school diploma (baccalaureat)	47 (9.1)	21 (10.9)	3.54 [1.46–8.6]		3.42 [1.21–9.66]
2 years after diploma	110 (21.4)	39 (20.2)	4.47 [1.99–10.04]		3.97 [1.53–10.28]
3–4 years after diploma	179 (34.8)	73 (37.8)	3.88 [1.79–8.40]		3.61 [1.44–9.03]
≥5 years after diploma	167 (32.4)	41 (21.2)	6.45 [2.90–14.34]		4.45 [1.74–11.37]
Occupation				0.014
Nurse or nurse management	159 (30.9)	71 (36.8)	0.76 [0.51–1.14]
Physician, midwife or pharmacist	86 (16.7)	17 (8.8)	1.71 [0.94–3.11]
Nursing assistant	30 (5.8)	21 (10.9)	0.48 [0.26–0.91]		–	–
Other healthcare profesionnals a	60 (11.6)	23 (11.9)	0.88 [0.50–1.55]
Technical or administrative staff	180 (34.9)	61 (31.6)	Ref.
Number of previous pregnancy				<0.001
1	155 (30.1)	30 (15.5)	Ref.
2	227 (44.1)	101 (52.3)	0.43 [0.28–0.69]		–	–
≥3	133 (25.8)	62 (32.1)	0.41 [0.25–0.68]
Time since the last pregnancy (years)				<0.001		<0.001
≤10	393 (76.3)	30.0)	14.63 [8.46–25.32]		14.11 [7.99–24.92]
10–20	97 (18.8)	81 (42.0)	2.59 [1.48–4.52]		2.46 [1.37–4.43]
>20	25 (4.8)	54 (28.0)	Ref.		Ref.

OR: Odds Ratio, CI: Confidence Interval.

^aradio manipulator, laboratory technician, physiotherapist, occupational therapist, dietician, psychologist, genetic counsellor, pharmacy technician, hospital porter.

^bOR adjusted on variables selected from backward procedure in the logistic regression model.