Table 2.

Changes in Sleep and Sleep Architecture after Sham or CPAP.

	Diagnostic	CPAP	2 Months	6 Months
Total Sleep Time (TST)
Sham	375.9±63.2	346.2±71.5	391.6±62.7	389.8±59.5
CPAP	376.1 ± 66.7	358.7±72.3†	395.5±61.7	397.8±61.2‡
Sleep Efficiency (%TST)
Sham	78.0±12.2	75.4±13.5	81.7±11.6	81.3±11.6
CPAP	78.4±13.3	77.6±13.5†	82.0±11.7	82.8±12.3*
Arousal Index (#/h)
Sham	30.4±21.9	32.3±19.7	30.5±20.1	30.0±20.5
CPAP	29.1±18.9	16.2±11.8§	15.5±10.3§	16.1±11.5§
N1 Sleep (Min)
Sham	71.5±55.2	67.3±49.3	66.7±51.7	68.0±56.3
CPAP	66.9±49.8	43.3±30.1§	49.3±33.4§	46.5±31.0§
N1 Sleep (% TST)
Sham	19.5±14.9	20.5±16.0	17.8±14.6	18.1±15.4
CPAP	18.5±14.3	12.4±8.4§	12.8±9.1§	12.1±8.5§
N2 Sleep (Min)
Sham	227.0±67.7	214.8±70.7	237.5±70.2	236.5±66.1
CPAP	229.0±66.1	227.0±56.4‡	250.0±57.3‡	253.3±52.6§
N2 Sleep (%TST)
Sham	60.2±14.4	61.4±15.1	60.2±14.0	60.5±13.8
CPAP	60.9±13.5	63.6±10.6‡	63.1±10.4§	63.7±9.0§
N3 Sleep (Min)
Sham	11.4±22.2	11.7±22.3	13.1±23.3	11.7±22.2
CPAP	11.1±20.3	16.6±26.1‡	15.2±26.7	14.8±26.1*
N3 Sleep (%TST)
Sham	3.0±5.8	3.4±6.5	3.3±5.8	2.8±5.2
CPAP	2.9±5.2	4.6±7.1†	3.8±6.7	3.6±6.3†
REM Sleep (Min)
Sham	65.4±29.2	51.9±27.5	73.3±30.9	73.2±31.4
CPAP	67.5±30.4	71.2±33.2§	80.5±31.2‡	82.7±33.5§
REM Sleep (%)
Sham	17.3±7.1	14.6±6.9	18.5±7.1	18.5±7.0
CPAP	17.5±6.9	19.3±7.7†	20.2±6.8‡	20.4±7.3†

^*p<0.1 vs. Sham

^†p<.05 vs. Sham

^‡p<.01 vs. Sham

^§p<.001 vs. Sham