Table 2.

Characteristics of women according to case/control classification.

Characteristics	Cases (n = 127)	Controls (n = 411)	p-Value a
Age, mean (SD)	36.01 (8.10)	41.50 (10.21)	<0.001
Current smokers	53.5%	36.8%	0.001
BMI, mean (SD)	22.47 (3.63)	23.59 (4.53)	0.012
Nutritional status
Underweight	11.0%	7.1%	0.052
Normal weight	67.5%	63.1%
Overweight	18.3%	19.8%
Obese	3.2%	10.0%
Workers	46.5%	46.5%	0.998
Parity (≥1 live births)	59.8%	71.8%	0.011
Low education level	41.0%	38.2%	0.579
Use of oral contraceptive	14.2%	8.0%	0.039

SD, standard deviation; BMI, Body Mass Index. ^a Statistically significant p-values (p < 0.05) are indicated in bold font.