Table 1: Sample mean and standard deviation (s.d.) for each of the three predictor variables and three dependent variables. The sample size of 38 is reduced slightly for some variables due to missing data (see text).

VariableMeans.d.

HRSD (depression)5.474.47
TRIG (grief)53.2212.71
Days since loss22086
PSQI (sleep quality index)6.323.51
TSA (time spent asleep) 6.6 h0.9 h
SE (percent sleep efficiency) 84.3%6.6%