. Author manuscript; available in PMC: 2015 Nov 1.

Published in final edited form as: Am J Perinatol. 2014 Feb 10;31(10):899–904. doi: 10.1055/s-0033-1363768

Table 2.

SDB indices in early and later pregnancy

	Early pregnancy, n = 60 with no valid 2nd study	Early pregnancy, n = 128 with 2 valid studies	Third trimester, n = 128 with 2 valid studies	p value^a
RDI, mean ± SD	7.9 ± 7.2	8.9 ± 10.7	11.9 ± 12.7	0.001
AHI, mean ± SD	4.7 ± 7.1	5.6 ± 10.8	8.8 ± 12.9	< 0.001
ODI, mean ± SD	2.0 ± 3.2	2.7 ± 7.6	4.2 ± 8.6	0.005

Abbreviations: AHI, apnea hypopnea index; ODI, oxygen desaturation index; RDI, respiratory disturbance index; SD, standard deviation; SDB, sleep disordered breathing.

Comparing early vs. third trimester in 128 subjects with 2 valid studies.