Skip to main content

Table 1 Sample statistics and psychometric properties of Geriatric Depression Scale and MDS Depression Rating Scale.

From: Measuring depression in nursing home residents with the MDS and GDS: an observational psychometric study

Sample statistic or psychometric property Cognitively Impaired Group (n = 495) Cognitively Intact Group (n = 209) All Participants (N = 704)
Number (%) with missing data on all items    
   GDS-15 81 (16%) 35 (17%) 116 (16%)
   GDS-5 110 (22%) 5 (2%) 115 (16%)*
   E1SUM 3 (1%) 2 (1%) 5 (1%)
   DRS 0 (0%) 0 (0%) 0 (0%)
Number (%) with complete data on all items    
   GDS-15 139 (28%) 111 (53%) 250 (36%)*
   GDS-5 223 (45%) 157 (75%) 380 (54%)*
   E1SUM 492 (99%) 207 (99%) 699 (99%)
   DRS 494 (100%) 209 (100%) 703 (100%)
Number (%) with majority of scale items not missing    
   GDS-15 357 (72%) 203 (97%) 560 (80%)*
   GDS-5 352 (71%) 200 (96%) 552 (78%)*
   E1SUM 495 (100%) 209 (100%) 704 (100%)
   DRS 495 (100%) 209 (100%) 704 (100%)
Mean* (SD)    
   GDS-15 4.7 (3.5) 4.9 (3.4) 4.8 (3.5)
   GDS-5 2.0 (1.5) 2.1 (1.6) 1.5 (1.6)
   E1SUM 3.9 (3.8) 2.7 (3.4) 3.6 (3.7)*
   DRS 1.9 (2.1) 1.8 (2.3) 1.9 (2.2)
Proportion at floor    
   GDS-15 0.081 0.053 0.072
   GDS-5 0.166 0.167 0.166
   E1SUM 0.206 0.349 0.249*
   DRS 0.356 0.397 0.368
Alpha – internal consistency reliability – row-wise complete cases only    
   GDS-15 0.799 0.781 0.791
   GDS-5 0.609 0.597 0.602
   E1SUM 0.695 0.738 0.708
   DRS 0.542 0.672 0.583*
Alpha – internal consistency reliability – row-wise mean substitution for missing data    
   GDS-15 0.825 0.798 0.814
   GDS-5 0.663 0.634 0.651
   E1SUM 0.695 0.738 0.708
   DRS 0.542 0.672 0.583*
Correlation coefficients    
   (GDS-5, GDS-15) 0.858 0.852 0.856
   (DRS, GDS-15) 0.073 0.098 0.080
   (DRS, GDS-5) 0.065 0.064 0.062
   (E1SUM, GDS-15) 0.068 0.096 0.072
   (E1SUM, GDS-5) 0.055 0.058 0.049
   (E1SUM, DRS) 0.850 0.940 0.865*
  1. Abbreviations: GDS-15, 15-item Geriatric Depression Scale; GDS-5, 5-item Geriatric Depression Scale; DRS, Minimum Data Set (MDS) Depression Rating Scale; E1SUM denotes the sum of all mood and anxiety items in section E1 of the MDS; SD, standard deviation
  2. * For each respondent, if a majority of the items were not missing, any missing item was replaced with the mean of the non-missing items.
  3. † Missing item responses replaced with mean score for all respondents 'non-missing' on that item.