Table 1

Sample demographic and health characteristics, overall and by surgical cohort, including tests of differences across cohorts
Overall sample (n = 1948) Foot/Ankle (n = 349) Elbow/Shoulder (n = 378) Neck/Back (n = 454) Hip/Knee (n = 767) p-value
Proportions (%)
Sex Female 48.6 60.7 39.2 48.1 48.1 <0.0001
Income Low 23.2 22.4 27.1 19.4 23.8 <0.0001
Missing 17.7 11.9 11.5 30.6 15.8
Education <= high school 32.6 21.6 33.4 37.8 34.1 <0.0001
Race White 78.4 81.1 74.8 79.2 78.3 0.1897
Asian 5.0 4.2 5.3 5.6 4.9
Black 4.5 2.8 5.3 4.1 5.0
South Asian 4.3 3.9 4.0 4.1 4.9
Other 7.8 8.1 10.6 6.9 6.9
Body Mass Index Overweight 38.0 34.3 40.6 36.5 39.5 <0.0001
Obese 24.7 19.8 23.4 21.5 29.5
Means (sd)
Age 51.9 (18–93) 49.0 (18–84) 50.7 (18–90) 49.0 (18–87) 55.5 (18–93) <0.0001
Comorbidity Count 1.5 (1.9) 1.5 (1.9) 1.3 (1.7) 1.5 (1.9) 1.7 (1.9) 0.0011
Body Mass Index 27.2 (5.4) 26.3 (5.3) 27.0 (4.7) 26.8 (5.5) 27.9 (5.6) <0.0001
Bodily Pain 40.5 (23.5) 47.9 (24.3) 42.5 (23.7) 37.0 (23.7) 38.1 (22.1) <0.0001
Physical Functioning 52.2 (28.6) 60.7 (28.6) 66.1 (25.2) 47.3 (27.8) 44.4 (27.1) <0.0001
Mental Health 68.7 (20.3) 71.4 (18.9) 70.2 (19.8) 65.0 (21.1) 69.0 (20.3) <0.0001
General Health 66.3 (21.1) 68.9 (21.3) 67.9 (20.3) 61.1 (22.0) 67.3 (20.4) <0.0001

Perruccio et al.

Perruccio et al. BMC Musculoskeletal Disorders 2013 14:83   doi:10.1186/1471-2474-14-83

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