Depression in the Spousally Bereaved Elderly: Correlations with Subjective Sleep Measures

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).

Variable	Mean	s.d.
HRSD (depression)	5.47	4.47
TRIG (grief)	53.22	12.71
Days since loss	220	86
PSQI (sleep quality index)	6.32	3.51
TSA (time spent asleep)	6.6 h	0.9 h
SE (percent sleep efficiency)	84.3%	6.6%