Total Hip Replacement Performance & Assessment

A subjective human grading assessment of surgical performance. Rated on a 5 point scale, with a higher score indicating a more competently performed procedure. OSATS only performed for group 1a and 1b (i.e. Residents). Expert group did not have OSATS collected.

Time frame: Assessment performed post-operatively within 60 minutes following procedure for each patient participant.

Population: The OSAT used was a standardised, validated OSAT used by the joint committee of surgical training (JCST) in the UK.~Only Surgical Resident participants were assessed.

Total number of surgeon hand movements obtained from elbow worn wireless motion sensors for each operation performed by the recruited surgeon participant as lead surgeon.

Time frame: Intra-operatively (single patient participant)

Population: Outcome measure results represent the group mean average and standard deviations.~Only Surgeon participants were assessed.

Total time taken by each surgeon participant per step of the total hip replacement for each operation performed as lead surgeon.

Time frame: Intra-operatively (single patient participant)

Population: Outcome measure results represent the group mean average and standard deviations for total operative time.~Only Surgeon participants were assessed.

A subjective human grading assessment of surgical performance rated on a scale of 7-35 with a higher score indicating a better surgical performance. GRS only performed for group 1a and 1b (i.e. Residents). Expert group did not have GRS collected.

Time frame: Assessment performed post-operatively within 60 minutes following procedure for each patient participant.

Population: Outcome measure results represent the group median average and interquartile ranges.~Only Surgical Resident participants were assessed.

A general patient-reported outcome measure (PROM) to be assessed pre- and post-operatively. The EQ-5D is comprised of 5 short questions each rated on a scale of 1-5 (25 points in total), with a higher score indicating a higher quality of life, and a visual analogue scale (EQ VAS) from 0-100, with a higher score indicating better health. The change in score is presented and is defined as the value of the later time point (3-4 months post-operatively) minus the value at the earlier time point (pre-operatively).

Time frame: Determined for each recruited patient pre-operatively and again at 3-4 months post-operatively.

Population: Change in EQ-5D VAS. Outcome measure results represent the group mean average and standard deviation.~Only patient participants were assessed.

The number of units of packed red blood cells transfused for each patient participant (if applicable).

Time frame: Assessment performed per single patient participant during in-patient stay up to 14 days following operation.

Population: Blood transfusions required. Only patient participants were assessed.

A joint-specific patient-reported outcome measure (PROM) to be assessed pre- and post-operatively. This is a 12 item questionnaire scored on a scale of 0-48, with a higher score representing better joint function. The change in score is presented and is defined as the value of the later time point (3-4 months post-operatively) minus the value at the earlier time point (pre-operatively).

Time frame: Determined for each recruited patient pre-operatively and again at 3-4 months post-operatively

Population: Change in OHS. Outcome measure results represent the group mean average and standard deviation.~Only patient participants were assessed.

Estimated on-table blood loss (OTBL) for each patient participant whose operation performed by the recruited surgeon participant as lead surgeon. This figure was calculated by subtracting the total volume of intra-operative irrigation fluid used from the total volume of fluid in the suction canister in addition to weighing the surgical swabs.

Time frame: Assessment performed post-operatively within 60 minutes following procedure for each patient participant.

Population: Outcome measure results represent the group mean average and standard deviations.~Only patient participants were assessed.

Length of stay (total days) for each patient recruited into this study.

Time frame: From post-operation through to hospital discharge.

Population: Length of post-operative in-patient stay (days). Outcome measure results represent the group mean average and standard deviation.~Only patient participants were assessed.

Post-operative X-ray analysis for component orientation for each patient recruited into this study whose operation was performed by a recruited surgeon participant as lead surgeon.

Time frame: Assessment performed post-operatively within 8 weeks following procedure for each patient participant.

Population: radiographic inclination of acetabular cup. Outcome measure results represent the group mean average and standard deviation.~Only patient participants were assessed.