Table 2 Study variables to be requested for individual participant data meta-analysis
Broad classification | Variables |
|---|---|
Socio-demographic characteristics | Country in which study was carried out, age, sex, body mass index (weight and height) and smoking status |
Past medical/surgical history | Previous hip surgery, other joint surgery and comorbidities (for example, history of diabetes), Charnley classification, Charlson index, ASA grade |
Infection characteristics before revision surgery | Duration between index implantation and occurrence/diagnosis of infection, duration between diagnosis of infection and revision surgery |
Baseline laboratory data for infection | CRP, ESR, leucocytes, causative organism, neutrophil count, white cell count, synovial fluid white cell count, IL-6 |
Characteristics of surgical revision | Date of revision, type of re-implantation, type of fixation (cemented or uncemented), use of spacer, type of spacer (static or articulating), use of antibiotics in cement or spacer, time interval between stages for two-stage procedure, diagnosis of re-infection, date of diagnosis of re-infection or date of last follow-up for participants without re-infection, time to re-infection or last follow-up (days or years), antibiotics used and duration of antibiotics |
Intervention | One- or two-stage revision |