Table 3. Relationship of RLS with different study subjects’ characteristics.

*Alpha criterion was set as 0.05 or fewer, which is considered a significant value.

RLS: restless legs syndrome, NS: not significant

Sociodemographic characteristic	Pregnant with RLS		p-value*
	Yes (frequency (%))	No (frequency (%))
Age (years)
18-25	22 (18%)	90 (26.7%)	NS
26-35	58 (47.5%)	163 (48.4%)
36-45	37 (30.3%)	79 (23.4%)
More than 45	5 (4.2%)	5 (1.5%)
Educational level
Not educated	0 (0%)	4 (1.2%)	NS
Primary school	1 (0.8%)	5 (1.5%)
Intermediate school	5 (4.1%)	23 (6.8%)
Secondary school	21 (17.2%)	50 (14.8%)
University or higher	95 (77.9%)	255 (75.7%)
Smoker
No	114 (93.4%)	317 (94.1%)	NS
Yes	8 (6.6%)	20 (5.9%)
Chronic disorder
No	113 (92.6%)	315 (93.5%)	NS
Yes	9 (7.4%)	22 (6.5%)
Psychiatric disorder
No	106 (86.9%)	294 (87.2%)	NS
Yes	16 (13.1%)	43 (12.8%)
Suffering from insomnia
No	20 (16.4%)	234 (69.4%)	<0.001*
Yes	102 (83.6%)	103 (30.6%)
Frequent waking up during the night
No	31 (25.4%)	257 (76.3%)	<0.001*
Yes	91 (74.6%)	80 (23.7%)
Pregnancy frequency
First time	36 (29.5%)	128 (38.1%)	0.04*
2-5 times	70 (57.4%)	185 (55.1%)
More than five times	16 (13.1%)	23 (6.8%)
Pregnancy phase
First trimester	22 (18%)	84 (24.9%)	NS
Second trimester	44 (36.1%)	128 (38%)
Third trimester	56 (45.9%)	125 (37.1%)
Preeclampsia
No	117 (95.9%)	327 (97%)	NS
Yes	5 (4.1%)	10 (3%)
Gestational diabetes
No	108 (88.5%)	304 (90.2%)	NS
Yes	14 (11.5%)	33 (9.8%)
Vitamin D deficiency
No	78 (63.9%)	264 (78.3%)	0.002*
Yes	44 (36.1%)	73 (21.7%)
Calcium deficiency
No	81 (66.4%)	292 (86.6%)	<0.001*
Yes	41 (33.6%)	45 (13.4%)
Iron deficiency
No	65 (53.3%)	241 (71.5%)	<0.001*
Yes	57 (46.7%)	96 (28.5%)