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Table 1 Baseline characteristics of the analysis cohort (n = 2,005)

From: A prospective study of mental health care for comorbid depressed mood in older adults with painful osteoarthritis

Characteristic Overall
N = 2,005
Mental health score ≥ 60
N = 1,429
Mental health score < 60
N = 576
p-value *
Sex (% female) 73.2 72.2 75.5 0.13
Age in years: mean (S.D.) 70.7 (9.1) 71.2 (8.9) 69.7 (9.4) 0.002
Region (% urban) 43.5 41.5 48.4 0.005
Income (%)     < 0.0001
   ≤ $20,000 52.4 47.7 63.9  
   > $20,000 30.2 33.2 22.6  
   Missing 17.5 19.0 13.5  
Education (%)     < 0.0001
   < high school graduation 35.7 33.0 42.4  
   High school graduation 47.5 47.7 47.1  
   Some post-secondary education 14.9 17.6 8.3  
   Missing 2.0 1.8 2.3  
Living arrangements (%)     0.16
   Lives alone 30.3 29.5 32.1  
   Lives with others 66.4 67.5 63.7  
   In long-term care 1.4 1.1 2.1  
   missing 2.0 1.9 2.1  
Race (%)     0.082
   Caucasian 93.0 93.1 92.7  
   Non-Caucasian 3.7 3.2 4.9  
   Missing 3.3 3.7 2.4  
Number of comorbidities (%)     < 0.0001
   None 29.2 31.0 24.8  
   1 30.6 32.4 26.0  
   2 21.0 19.7 24.3  
   3+ 19.2 16.9 24.8  
Body Mass Index: mean (S.D.) 28.1 (5.4) 28.1 (5.2) 28.0 (5.8) 0.82
SF-36 general health scale /100:
mean (S.D.)
49.2 (22.1) 54.7 (20.7) 35.5 (19.2) < 0.0001
WOMAC total score /100:
mean (S.D.)
40.3 (19.5) 37.5 (18.6) 47.3 (20.0) < 0.0001
WOMAC pain score /100:
mean (S.D.)
40.5 (21.7) 37.9 (21.0) 46.8 (21.9) < 0.0001
Mental Health Subscale score /100:
Mean (S.D.)
68.5 (20.4) 79.0 (11.3) 42.5 (13.2) < 0.0001
Self-reported depression     
(% reporting ever depressed or other major mental illness) 16.4 7.2 39.2 < 0.0001
(% reporting treatment for depression or other major mental illness in past year) 9.2 3.2 24.1 < 0.0001
  1. *P values comparing depressed to non-depressed. Fisher's Exact tests were used to compare binary characteristics, chi-square tests were used to compare characteristics with more than 2 categories, t-tests were used to compare normally distributed variables (WOMAC, SF-36, age).