Table 2

Forearm vascular reactivity before and after CPAP (expressed as a % baseline flow)

	ACh low	ACh high	SNP low	SNP high	l-NMMA high	ACh/l-NMMA	l-Arg
ACh, acetylcholine; SNP, sodium nitroprusside; l-NMMA, N^G-monomethyl-l-arginine; l-Arg, l-arginine.
Before CPAP
Subject 1	167	209	624	1250	164	149	80
Subject 2	132	296	281	357	67	60	57
Subject 3	362	474	372	650	95	431	159
Subject 4	141	156	149	222	113	124	138
Subject 5	167	572	376	476	94	420	128
Subject 6	135	168	151	214	114	137	135
Subject 7	122	183	224	285	63	174	135
Subject 8	300	442	264	354	62	372	161
Subject 9	87	163	134	194	67	106	125
Subject 10	106	163	88	101	78	104	111

After CPAP
Subject 1	122	289	188	368	62	159	176
Subject 2	228	369	249	340	94	227	146
Subject 3	508	764	403	538	82	470	167
Subject 4	495	504	336	561	103	138	130
Subject 5	190	661	472	571	103	520	147
Subject 6	130	267	291	393	66	59	61
Subject 7	131	253	382	523	80	183	122
Subject 8	248	411	153	337	70	278	136
Subject 9	206	412	153	293	70	273	137
Subject 10	105	410	207	260	67	459	131