You are viewing the site in preview mode

Skip to main content

Advertisement

Table 2 Sociodemographic data

From: Ancestry informative markers and selected single nucleotide polymorphisms in immunoregulatory genes on preterm labor and preterm premature rupture of membranes: a case control study

Variablesa Control (n = 201) PTL (n = 136) PPROM (n = 65) p (Control vs. PTL) p (Control vs. PPROM)
Age (years) 23.9 (±6.1) 22.8 (±6.3) 26.2 (±6.2)   
GA at delivery (days) 278 (273–284) 251 (236–260) 247 (238–254) p < 0.001 p < 0.001
GA at PTL/PPROM (days)   241 (224–250) 244 (230–251)   
Marital status
 Single 21.1 % (42/199) 27.6 % (35/127) 19.7 % (12/61) NS NS
 Married 78.9 % (157/199) 72.4 % (92/127) 80.3 % (49/61)
Self-reported ethnicity
 White 52.3 % (104/199) 62.7 % (84/134) 60 % (39/65) NS NS
 Non-white 47.7 % (95/199) 37.3 % (50/134) 40 % (26/65)
Parity
 Primiparous 48.5 % (97/200) 46.3 % (62/134) 36.9 % (24/65) NS NS
 Multiparous 51.5 % (103/200) 53.7 % (72/134) 63.1 % (41/65)
Smoking habits
 Yes 11.9 % (24/201) 23.5 % (31/132) 21.5 % (14/65) p = 0.007 NS
 No 88.1 % (177/201) 76.5 % (101/132) 78.5 % (51/65)
Years of study
 Up until 9 years 23.8 % (45/189) 25.6 % (32/125) 21 % (13/62) NS  
 9 to 12 years 70.4 % (133/189) 72 % (90/125) 75.8 % (47/62) NS
 More than 12 years 5.8 % (11/189) 2.4 % (3/125) 3.2 % (2/62)  
Previous PPROM
 Yes - 20.8 % (15/72) 24.4 % (10/41)   
 No 100 % (102/102) 79.2 % (57/72) 75.6 % (31/41)  
Previous PTL
 Yes - 43.1 % (31/72) 29.3 % (12/41)   
 No 100 % (102/102) 56.9 % (41/72) 70.7 % (29/41)  
Abortion
 Yes 24.8 % (28/113) 34.7 % (25/72) 31.7 % (13/41) NS NS
 No 75.2 % (85/113) 65.3 % (47/72) 68.3 % (28/41)
Family history PTL/PPROM
 Yes 23.3 % (24/127) 46.6 % (62/133) 43.1 % (28/65) p < 0.001 p < 0.001
 No 76.7 % (103/127) 53.4 % (71/133) 56.9 % (37/65)
  1. PTL preterm labor, PPROM preterm premature rupture of membranes, GA gestational age, NS non significant. Variable Age presented as mean (±SD). GA presented as median (25–75 %) and compared by Mann–Whitney. Others variables presented as percentage (total number) and compared by χ 2. For previous PPROM and PTL only multiparous women were considered and for Abortion only women with multiple gestations. aComparisons were made between PTL and Controls and between PPROM and Controls