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Table 1 Means (and Standard deviations) for the psychological variables before and after the treatment period

From: Beneficial effects of treatment with sensory isolation in flotation-tank as a preventive health-care intervention – a randomized controlled pilot trial

Variable Before After Difference
SE Stress control 1.84 (1.15) 1.89 (1.04) + 0.05 n.s
SE Stress floating 1.86 (1.07) 0.95 (0.84 - 0.91 **
SE Energy control 3.44 (0.70) 2.63 (0.96) - 0.81 n.s
SE Energy floating 3.14 (0.66) 2.46 (1.02) - 0.74 n.s
HADS Anxiety control 7.03 (3.46) 6.96 (3.52) - 0.07 n.s
HADS Anxiety floating 7.92 (4.61) 4.28 (3.61) - 3.64 **
HADS Depression control 4.00 (3.41) 4.30 (2.58) + 0.30 n.s
HADS Depression floating 4.42 (3.47) 2.25 (2.53) - 2.17 **
LOT optimism control 20.96 (5.05) 20.93 (5.76) - 0.03 n.s
LOT optimism floating 19.81 (5.29) 23.28 (4.26) + 3.47 **
SQ Sleep Quality control 25.22 (9.98) 25.33 (8.87) + 0.11 n.s
SQ Sleep Quality floating 23.72 (7.55) 29.69 (8.44) + 5.97 **
  1. ** = significant effect, p < 0.001; n.s = non significant effect.