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Table 3 Mean values of the outcomes of pain, function and pain catastrophizing from bivariable analyses for each area-level SES † group

From: Association between socioeconomic status and pain, function and pain catastrophizing at presentation for total knee arthroplasty

Dependent variable

Overall cohort

SES 1

SES 2

SES 3

p-value*

 

N = 316

N = 85

N = 87

N = 144

 

Pain – mean (SD)

41.0 (18.2)

46.2 (20.2)

42.4 (18.4)

37.2 (15.9)

<0.01

Functional status- mean (SD)

41.8 (17.1)

46.6 (17.8)

42.8 (17.5)

38.4 (15.8)

<0.01

Pain catastrophizing- mean (SD)

12.0 (10.7)

13.8 (12.1)

13.3 (11.5)

10.2 (8.9)

0.01

  1. *P-values determined from Ward tests of beta coefficients in a model assuming linear trend of SES index groups: †SES 1 is the lowest quartile, SES 3 is the highest two quartiles combined.