Table 2.

Difference in Impact Event Scale-Revised (IES-R) scores between trimesters of pregnancy

Event Scale-Revised (IES-R) Score	All (n = 384)	Pregnancy trimesters			P-value
		1st Trimester (n = 79)	2nd Trimester (n = 177)	3rd Trimester (n = 128)
IES-R, mean ± SD
Total score	26.15 ± 13.55	24.99 ± 14.28	24.98 ± 12.21	28.48 ± 14.61	a0.06
IES-R category %
Normal (0–23)	47.1	45.6	50.8	43.0	b0.12
Mild (24–32)	17.7	15.2	18.6	18.0
Moderate (33–36)	12.2	16.4	13.0	8.6
Severe (≥37)	23.0	22.8	17.6	30.4

SD Standard Deviation; P < 0.05 vs. significance for IES-R scores by ^a ANOVA; ^b IES-R scores categories by Chi-square test.