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. 2025 Aug 25;25:883. doi: 10.1186/s12884-025-08024-x

Table 2.

Medical history characteristics and comparison between dependent and independent variables, n (320) 2024

Variables Total
n (%)
SIAH P-value
Yes
n (%)
No
n (%)
Previous cesarean section
Yes 123 (38.4) 104 (41.6) 19 (27.1) 0.028
No 197 (61.6) 146 (58.4) 51 (72.9)
History hypertension in pregnancy
Yes 35 (10.9) 16 (6.4) 19 (27.1) < 0.001
No 285 (89.1) 234(93.6) 51 (72.9)
Baseline systolic blood pressure
Less than or equal 120 282 (88.1) 231 (92.4) 51 (72.9) < 0.001
> 120 38 (11.9) 19 (7.6) 19 (27.1)
Baseline heart rate (bpm)
Less than or equal 100 299 (93.4) 235 (94.0) 64 (91.4) 0.421a
> 100 21 (6.6) 15 (6.0) 6 (8.6)
Fasting duration (hours)
Yes 242 (75.6) 187 (74.8) 55 (78.6) 0.516
No 78 (24.4) 63 (25.2) 15 (21.4)

The p-value (bold) was calculated using the chi-square test to assess the association between the dependent and independent variables, with a significance level of α = 0.05

aFisher’s exact test