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Table 4 Patient-Caregiver Concordance for Pain, Anxiety, and Depression Scales

From: Agreement between older adult patient and caregiver proxy symptom reports

Item #a Item Item mean (SD) Spearman correlationb Weighted Kappac
Patients Care-givers Quadratic Linear
  PEG pain
1 Pain on average in the past week 4.7 (3.1) 4.8 (3.1) 0.57 0.57 0.43
2 Pain interference with enjoyment of life 3.8 (3.5) 4.1 (3.5) 0.50 0.50 0.37
3 Pain interference with general activity 3.9 (3.4) 4.1 (3.5) 0.48 0.49 0.37
  PEG scale scored 4.1 (3.1) 4.3 (3.2) 0.58 0.58 (0.49 to 0.66)  
  GAD-7 anxiety
3 Worrying too much about different things 0.7 (1.0) 0.8 (1.0) 0.31 0.30 0.24
2 Not being able to stop or control worrying 0.5 (0.9) 0.7 (1.0) 0.31 0.27 0.22
6 Becoming easily annoyed or irritable 0.5 (0.7) 0.7 (0.9) 0.30 0.25 0.24
4 Trouble relaxing 0.5 (0.9) 0.6 (0.9) 0.30 0.23 0.23
1 Feeling or appearing nervous, anxious or on edge 0.5 (0.8) 0.6 (0.8) 0.27 0.22 0.22
5 Being so restless that it is hard to sit still 0.3 (0.7) 0.3 (0.7) 0.18 0.16 0.16
7 Feeling or appearing afraid as if something awful might happen 0.3 (0.7) 0.3 (0.7) 0.09 0.07 0.08
  GAD-7 scale scored 3.3 (2.0) 3.9 (4.5) 0.31 0.28 (0.16 to 0.39)  
  PHQ-8 depression
5 Feeling tired or having little energy 1.2 (1.1) 1.2 (1.1) 0.33 0.31 0.25
4 Poor appetite or overeating 0.7 (1.0) 0.7 (1.0) 0.34 0.30 0.24
2 Feeling or appearing down, depressed, or hopeless 0.4 (0.8) 0.5 (0.9) 0.31 0.30 0.26
3 Trouble falling asleep, trouble staying asleep, or sleeping too much 0.9 (1.1) 0.9 (1.1) 0.27 0.25 0.21
7 Trouble concentrating on things such as reading the newspaper or watching television 0.4 (0.8) 0.4 (0.8) 0.09 0.15 0.09
6 Indicating that s/he feels bad about self, is a failure, or has let self or family down 0.3 (0.8) 0.4 (0.8) 0.22 0.13 0.14
1 Little interest or little pleasure in doing things 0.6 (0.9) 0.6 (0.9) 0.17 0.11 0.11
8 Moving or speaking so slowly that other people could have noticed. …Or the opposite–being so fidgety or restless that s/he has been moving around a lot more than usual 0.5 (0.9) 0.4 (0.9) 0.08 0.06 0.05
  PHQ-8 scale scored 5.0 (4.6) 5.2 (5.0) 0.34 0.25 (0.13–0.36)  
  1. aItems for each scale are ordered in table from highest to lowest quadratic weighted kappa
  2. bMost of the Spearman correlations are highly significant (p < .0001) except for items only significant at p < .05 (PHQ-8 items 1, 6; GAD-7 items 1, 5) or those not significant (PHQ-8 items 7, 8; GAD-7 item 7)
  3. cAll weighted kappa values are significant (i.e., 95% CI does not include 0) except for GAD-7 items 5 and 7 and PHQ-8 items 1, 6, 7 and 8 (quadratic and linear)
  4. dFor scale scores, the value under the weighted kappa column is the Intraclass Correlation Coefficient (ICC) with 95% CI, calculated using the absolute agreement version of the ICC and specifying rater (patient vs their caregiver) as a fixed effect