Table 1.

Characteristics of the sample according to smoking habits

	Non smokers n = 34	Smokers n = 30	P
Characteristics
Age	27.6 ± 6.1	27.3 ± 5.2	0.82
Pregnancies	2.0 [1 a 5]	3.0 [3 a 11]	0.04
Parities	1.0 [0 a 4]	1.5 [0 a 7]	0.04
Abortions	0.0 [0 a 3]	0.0 [ 0 a 3]	0.62
AFI	14.0 ± 2.0	13.3 ± 2.8	0.21
Placenta grade	1 (56%) [0 a 2]	1(70%) [0 a 3]	0.31

Data are presented as mean ± SD or median [minimum and maximum]. AFI: amniotic fluid index. Age (years), pregnancies, abortions and parities (number), Amniotic Fluid Index(cm), Placenta grade percent type I (As classification Granumm)¹⁷. P: statistical significance