Table 2.

Loadings of PCV and PCH in analyzing six OSAHS traits in CFS African American (AA) and European American (EA) cohorts

		PCH						PCV
	Trait	PC1	PC2	PC3	PC4	PC5	PC6	PC1	PC2	PC3	PC4	PC5	PC6
AA	AHI	0.536	0	0.101	0	0.799	0.235	−0.3540	−0.1503	0.4261	0.2383	0.4779	0.6636
	AVGDUR	0.191	−0.64	0.648	−0.333	−0.143	0	0.9098	−0.2549	0.1288	0.0803	−0.1409	0.0086
	EXCSLPDY	0.277	−0.37	−0.722	−0.513	0	0	−0.0002	0.6256	0.3250	0.5229	−0.0989	−0.1975
	PER90	0.445	0.427	0	−0.108	−0.52	0.576	−0.0108	−0.4203	−0.4669	0.7160	−0.6907	0.0413
	HABSNORE	0.389	−0.417	−0.175	0.773	−0.215	0	0.2111	0.4594	−0.6853	−0.0600	0.1805	0.0006
	AVGO2	−0.501	−0.299	−0.112	0.123	0.149	0.781	−0.0485	0.3652	−0.0925	0.3836	−0.4819	0.7203
EA	AHI	0.517	0.118	0.129	0	0.591	0.59	−0.287	0.283	−0.447	−0.227	0.719	0.5242
	AVGDUR	0.157	−0.5	0.814	0.204	−0.131	0	0.837	−0.053	−0.142	0.169	0.085	−0.068
	EXCSLPDY	0.251	−0.584	−0.535	0.553	0	0	−0.007	0.537	−0.071	−0.161	0.127	−0.617
	PER90	0.464	0.389	0	0.249	−0.71	0.258	−0.277	−0.455	−0.641	0.636	0.068	−0.463
	HABSNORE	0.401	−0.405	−0.182	−0.757	−0.25	0	−0.058	0.455	−0.558	0.281	−0.429	0.336
	AVGO2	−0.518	−0.281	0	−0.107	−0.254	0.759	−0.371	0.463	0.23	0.641	0.52	0.113

Abbreviations are as follows: AA: African American; EA: European American; AVGO2: Average nocturnal oxygen saturation; PER90: percentage of sleep time at oxygen saturation < 90%; EXCPLSPY: excessive daytime sleepiness; HABSNORE: habitual snoring; AHI: Apnea Hypopnea Index; AVGDUR: Average duration of apnea and hypopneas