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. 2023 Sep 13;23:658. doi: 10.1186/s12884-023-05977-9

Table 2.

Demographic data of the studied population

Total (n = 70) Incidence of preterm birth Test of significance P
Yes (n = 22) No (n = 48)
Age (years)
Mean ± SD 26.03 ± 4.43 26.27 ± 4.81 25.92 ± 4.29 t = 0.310 0.757 (NS)
BMI (Kg/m2)
Mean ± SD 27.38 ± 3.52 27.40 ± 3.43 27.37 ± 3.60 t = 0.032 0.975 (NS)
Parity
Min – Max 1.0 – 5.0 1.0 – 5.0 1.0 – 4.0 U = 502.0 0.724 (NS)
Median (IQR) 2.0 (1.0 – 2.0) 2.0 (1.0 – 2.0) 2.0 (1.0 – 2.0)
Past CS No % No % No %
No 45 64.3 13 59.1 32 66.7 χ2 = 0.377 0.539 (NS)
Yes 25 35.7 9 40.9 16 33.3
Pre-delivery Hemoglobin
Mean ± SD 11.27 ± 0.92 11.34 ± 0.85 11.24 ± 0.96 t = 0.398 0.692 (NS)

SD Standard deviation, IQR Interquartile range, t Student t-test, U Mann Whitney test, χ2 Chi square test, NS Non-significant, p p value