Results of individual studies on the association between postsurgical pain and baseline obesity
| Obesity versus pain | |||
| Author, year | BMI: mean (SD) | Measure | Results |
| Knee | |||
| Davis et al, 201138 | NA | HOOS/KOOS | After adjusting for age, gender, joint and presence of back pain, an increased BMI was associated with worst pain outcomes (P<0.02) at long term after THA or TKA. |
| Järvenpää et al, 201051 | 29.7 (NA) | VAS | Increased BMI correlates significantly to VAS pain scale (r=0.236; P=0.018) at short term after TKA. |
| Liljensøe et al, 201360 | 30 (NA) | SF-36 | BMI was not associated with SF-36 pain scale (OR=0.96; P=0.1) at long term after TKA. |
| Mackie et al, 201563 | NA | WOMAC | Increased BMI was associated with less improvement in WOMAC pain scale (t=−2.64; P<0.001) at long term after TKA. |
| Hip | |||
| Dowsey et al, 201040 | 29.55 (5.64)* | Harris Hip Score | BMI was not associated with pain reduction (P=0.71) at long term after THA. |
| Heiberg et al, 201345 | 27 (6.27)* | HOOS | BMI was not associated with HOOS pain scale (P>0.05) at short term after THA. |
*Calculated following guidelines from Cochrane Handbook for Systematic Reviews of Interventions.
BMI, body mass index; HOOS, Hip Dysfunction and Osteoarthritis Outcome Score; KOOS, Knee Injury and Osteoarthritis Outcome Score; NA, none available; SF-36, Short Form 36 Questionnaire; THA, total hip arthroplasty; TKA, total knee arthroplasty; VAS, visual analogue scale; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index.