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Table 1 Mean (S.D) values on the GSQS after the first and last night of each study period and average score for each two-week period

From: Effect of simulated dawn on quality of sleep – a community-based trial

  STUDY PERIOD (PERIODS WITH DAWN SIMULATION MARKED)
  I II III IV
  FIRST LAST AVERAGE FIRST LAST AVERAGE FIRST LAST AVERAGE FIRST LAST AVERAGE
GROUP 1 (N = 23) 4.4 (4.4) 3.4 (5.0) 3.8 (2.9) 3.0 (5.0) 2.4 (4.1) 3.2 (2.0) 2.3 (3.3) 3.3 (5.3) 2.9 (2.0) 3.4 (3.5) 4.8 (5.1) 4.2 (3.3)
GROUP 2 (N = 23) 4.7 (3.6) 2.7 (3.1) 3.7 (1.8) 2.5 (3.9) 2.1 (2.3) 3.0 (1.7) 3.2 (3.1) 1.7 (3.4) 2.7 (1.4) 5.7 (3.7) 1.1 (1.8) 2.9 (1.0)
GROUP 3 (N = 20) 5.7 (4.8) 4.8 (5.2) 3.9 (2.8) 2.6 (4.2) 3.2 (4.8) 2.8 (1.8) 3.4 (3.8) 2.6 (4.2) 2.4 (1.6) 4.7 (4.4) 2.4 (4.5) 2.7 (2.1)
GROUP 4 (N = 25) 5.4 (4.4) 5.0 (4.5) 5.0 (3.4) 2.0 (3.2) 3.8 (4.4) 3.0 (1.8) 4.0 (4.0) 2.6 (3.6) 3.5 (1.9) 3.5 (3.7) 1.9 (4.6) 2.8 (1.4)
  1. † AUTUMN GROUP (OCTOBER TO NOVEMBER) ‡ WINTER GROUP (JANUARY TO MARCH)