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. 2013 Aug;22(8):694–701. doi: 10.1089/jwh.2012.4039

Table 2.

Mean ISI Scores in Pregnant Latina Women

	First trimester 1–12 weeks n=386	Second trimester 13–26 weeks n=492	Third trimester 27+ weeks n=411	χ²or F-value	Overall
Total ISI, M(SD)	4.52 (5.44)	3.84 (4.75)	5.00 (5.00)	6.05^***	4.41 (5.07)
Total ISI, median	2.0	2.0	3.0	19.54^***	3.0
Difficulty falling asleep M(SD)	.72 (1.05)	.61 (.93)	.96 (1.09)	13.58^***	.75 (1.03)
Difficulty staying asleep M(SD)	.62 (.97)	.54 (.91)	.75 (.96)	5.57^***	.63 (.95)
Early awakening M(SD)	.62 (1.05)	.49 (.90)	.55 (.92)	1.87	.55 (.96)

^{^***}

p<0.001.