Table 2 Obstetrical history, pregnancy outcomes and leukocyte telomere length (n=297)

Maternal parity

 Nullipara

20 (6.7)

1.23 ± 0.19

Ref

 Primipara

99 (33.3)

1.15 ± 0.21

-1.44

[-0.09; 0.01]

0.15

 Multipara

178 (60.0)

1.16 ± 0.23

-1.14

[-0.16; 0.04]

0.25

History of stillbirth

 No

286 (96.3)

1.16 ± 0.22

Ref

 Yes

11 (3.7)

1.13 ± 0.25

-0.03

[-0.17; 0.10]

0.60

Previous miscarriage (n^a = 292)

 No

250 (85.7)

1.16 ± 0.22

Ref

 Yes

42 (14.3)

1.16 ± 0.21

-0.01

[-0.08; 0.06]

0.81

Previous Caesarian Section (n^a = 287)

 No previous C. Section

261 (90.9)

1.16 ± 0.22

Ref

 Previous C. Section

26 (9.1)

1.12 ± 0.19

-0.06

[-0.13; 0.04]

0.32

Previous Preterm Labor/ birth

 No

246 (82.8)

1.17 ± 0.22

Ref

 Yes

51 (17.2)

1.16 ± 0.23

0.01

[-0.06; 0.07]

0.84

Mode of delivery

 Caesarian section

58 (19.5)

1.17 ± 0.25

Ref

 Vaginal

239 (80.5)

1.16 ± 0.21

0.03

[-0.05; 0.08]

0.61

 Gestational age, weeks

38.81± 2.1

1.16 ± 0.22

0.04

[-01; 0.02]

0.59

 Gestational age, weeks (preterm only <37 weeks) (n = 27)

33.59 ± 2.61

1.15 ± 0.15

0.09

[-0.19;0.03]

0.62

Preterm delivery (<37 weeks)

 No

270 (90.9)

1.16 ± 0.23

Ref

 Yes

27 (9.1)

1.46 ± 0.16

-0.01

[-09; 0.08]

0.84

Preterm delivery (<34 weeks)

 No

286 (96.3)

1.16 ± 0.23

Ref

 Yes

11 (3.7)

1.17 ± 0.14

0.01

[-0.13; 0.14]

0.98

Late preterm delivery (34-<37 weeks)

 No

281 (94.6)

1.15 ± 0.17

Ref

 Yes

16 (5.4)

1.16 ± 0.23

-0.02

[-0.13; 0.09]

0.79

 Birthweight (n = 297) (grams)

3153.22 ± 544.45

1.16 ± 0.22

-0.08

[-0.01;0.02]

0.15

 Birthweight preterm (<37 weeks) (n = 27) (grams)

2063.33 ± 616.85

1.15 ± 0.16

0.14

[-0.06; 0.14]

0.47

 Low birth weight (<2500 g)

1874.80 ± 451.84

1.18 ± 0.16

0.27

[-0.05;0.025]

0.20