Figure 6.

Changes in sleep efficiency (SE) and movement and fragmentation index (FI) in GSS-subgroups/Fall. Before = mean for four days before transition, After 1,2,3 and 4 = means for the days after transition. Not seasonal = GSS-subgroup not seasonal, seasonal = GSS-subgroup seasonal.

Lahti et al. BMC Physiology 2008 8:3   doi:10.1186/1472-6793-8-3
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