Table 2 Overview of the assessments and time points
Phenotyping variables or candidate prognostic factors | Variables | Timepoints |
Sociodemographic and biomedical information | Age, sex, height, smoking status, educational level | T0 |
Body weight, marital status, employment status, number of comorbidities, number of physiotherapy sessions, sport | T0, T2, T3, T4 | |
Pain-related cognitions and emotions | Fear-Avoidance Components Scale – Dutch (FACS-D) [51] | T0, T1, T2, T3, T4 |
Tampa Scale for Kinesiophobia (TSK-17) [52] | T0, T1, T2, T3, T4 | |
Injustice Experience Questionnaire (IEQ) [53] | T0, T1, T2, T3, T4 | |
Self-efficacy | General Self-Efficacy Scale (GSES) [54] | T0, T2, T3, T4 |
Social support | Groningen Orthopaedic Social Support Scale (GO-SSS) [55] | T0, T2, T3, T4 |
Perceived stress | Question from the Perceived Stress Scale (PSS) [56] | T0, T1, T2, T3, T4 |
Traumatic experiences | Childhood Trauma Questionnaire (CTQ) [57] | T0, T4 |
Traumatic Experiences Checklist (TEC) [58] | T0, T4 | |
Mental disorders | MINI-S DSM-V [59] | T0, T4 |
MINI-S DSM-IV Suicidal risk [60] | T0, T4 | |
Hospital Anxiety and Depression Scale (HADS) [61] | T0, T1, T2, T3, T4 | |
Quantitative Sensory Testing (QST) | Cold detection threshold (CDT) (local, remote) | T0, T2, T3, T4 |
Warmth detection threshold (WDT) (local, remote) | T0, T2, T3, T4 | |
Cold Pain Threshold (CPT) (local, remote) | T0, T2, T3, T4 | |
Heat Pain Threshold (HPT) (local, remote) | T0, T2, T3, T4 | |
VAS 60 Temperature | T0, T2, T3, T4 | |
Temporal Summation of Pain (TSP) | T0, T2, T3, T4 | |
Conditioned Pain Modulation (CPM) | T0, T2, T3, T4 | |
Outcome variables | Variables | Timepoints |
Self-reported pain and disability | Hip disability and Osteoarthritis Outcome Score (HOOS) [62] | T0, T2, T3, T4 |
Patient Specific Functioning Scale (PSFS) [63] | T0, T2, T3, T4 | |
Numerical Pain Rating Scale (NPRS) [64] | T0, T1, T2, T3, T4 | |
Health-related quality of life | 36-item Short-Form Health Survey (SF-36) [65] | T0, T2, T3, T4 |
Effect of THA on hip complaints in general | Global Perceived Effect (GPE) [66] | T0, T1, T2, T3, T4 |
Satisfaction with the outcome after THA | Satisfaction (NRS) | T0, T1, T2, T3, T4 |
Performance-based measures (PBM) [67] | 30Â s chair stand test (30s-CST) | T0, T2, T3, T4 |
40Â m fast paced walk test (40Â m FPWT) | T0, T2, T3, T4 | |
10-step stair climb test (10-step SCT) | T0, T2, T3, T4 | |
Muscle strength testing [68] | Isometric muscle strength of the hip flexors, extensors, abductors, adductors, external rotators | T0, T2, T3, T4 |