. 2018 Apr;126:1–10. doi: 10.1016/j.jri.2018.01.001

Table 2.

Maternal demographic and clinical details of women who provided samples at both gestational time points (paired samples).

	Term, n = 18		Preterm, n = 16
	GTP1 (20⁺⁰–22⁺⁶ weeks)	GTP2 (26⁺⁰–28⁺⁶ weeks)	GTP1 (20⁺⁰–22⁺⁶ weeks)	GTP2 (26⁺⁰–28⁺⁶ weeks)
Age, years	30.3 ± 6.1	30.3 ± 6.1	31.3 ± 4.8	31.3 ± 4.8
BMI, kg/m²	27.4 ± 5.3	27.4 ± 5.3	28.3 ± 4.3	28.1 ± 4.7
Cervical length, mm	38.3 ± 5.9	33.6 ± 10.6^*	31.8 ± 10.3	25.8 ± 13.0^**
Fetal fibronectin, ng/ml	28.8 ± 36.5	12.4 ± 19.4	68.3 ± 101.5	57.7 ± 97.9
Vaginal pH	4.2 ± 0.5	4.1 ± 0.3	4.2 ± 0.6	4.3 ± 0.8
GAAS, weeks	21.3 ± 0.96	26.8 ± 0.73	20.9 ± 1.3	27.0 ± 1.0
GAAD, weeks	39.6 ± 1.2		33.3 ± 2.9^****

BMI, body mass index; GAAD, gestational age at delivery; GAAS, gestational age at sampling; GTP, gestational time point. Data presented as Mean ± Standard Deviation (SD).

P < 0.05.

^**

P = 0.01.

^****

P < 0.0001.