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Table 1 Analysis o f sleep architecture during symptomatic period (case #1) and asymptomatic period (case #2)

From: Monozygotic twins concordant for Kleine-Levin syndrome

  Case #1 Case #2
Stage minutes (%) symptomatic period asymptomatic period
Wake 207 (36.4) 13.5 (3.6)
Stage 1 55 (9.7) 37 (10)
Stage 2 130 (22.8) 150 (40.5)
Stage 3 45 (7.9) 21 (5.7)
Stage 4 39 (6.9) 53 (14.3)
REM 94 (16.5) 98 (26.4)
Sleep latency 15 7
Sleep efficiency 63.6% 96.4%
Total bed time 569 370