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Table 1 Population description (N = 117)

From: Resilience and pain catastrophizing among patients with total knee arthroplasty: a cohort study to examine psychological constructs as predictors of post-operative outcomes

Variable N (%) Median (Q1, Q3)
Age, years   67.0 (59.0, 72.0)
Female sex 62 (53.0)  
White race 81 (70.1)  
Hispanic or Latino ethnicitya 1 (0.9)  
Private insurance 51 (43.6)  
Married or living as married 83 (70.9)  
Employed in or out of the home 46 (39.3)  
4-Year college or higher 67 (57.3)  
BMI, kg/m2   33.1 (29.0, 37.7)
ASA class   
 1 2 (1.7)  
 2 67 (57.3)  
 3 48 (41.0)  
 4–6 0 (0)  
Primary surgery 106 (90.6)  
Contralateral knee TKA 37 (31.6)  
Osteoarthritis etiology 113 (96.6)  
History of depression 36 (30.8)  
History of anxiety 22 (18.8)  
Smoking status   
 Never smoker 74 (63.25)  
 Former smoker 37 (31.62)  
 Current smoker 6 (5.13)  
Pack yearsb   16.3 (6.0, 23.5)
History of diabetes 37 (31.6)  
History of hypertension 72 (61.5)  
History of cardiovascular disease 21 (17.9)  
History of back pain 68 (58.1)  
History of low back pain 56 (47.9)  
Pain rating   5.0 (3.0, 7.0)
BRS   4.0 (3.5, 4.3)
PCS   13 (5.0, 21.0)
KOOS IS   47.5 (39.6, 59.4)
PROMIS PH   39.8 (34.9, 44.9)
PROMIS MH   50.8 (45.8, 56.0)
PROMIS overall health rating   3.0 (3.0, 4.0)
PROMIS social activity rating   3.0 (2.0, 4.0)
  1. Continuous variables are presented using the median (25th, 75th percentiles) and categorical data are displayed using counts with percentages for non-missing data unless otherwise noted
  2. BMI body mass index, ASA Class American Society of Anesthesiologists physical status classification system, BRS Brief Resilience Score, PCS Pain Catastrophizing Scale, Pain Rating pain intensity on a 0–10-point scale, KOOS IS KOOS interval score, PROMIS PH PROMIS Global Physical Health T-score, PROMIS MH PROMIS Global Mental Health T-score, PROMIS Overall Health Rating raw response score from item 1 on PROMIS Global Health scale, PROMIS Social Activity Rating raw response score from remaining item 9 on PROMIS Global Health scale
  3. aHispanic or Latino Ethnicity was not included in further analyses due to low representation
  4. bPack years not available for every patient. N = 32