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Table 4 Assessment of Evidence Certainty using GRADE

From: A systematic review and meta-analysis of short-stay programmes for total hip and knee replacement, focusing on safety and optimal patient selection

Summary of findings:

Short-stay compared to usual care for total hip and knee replacement

Patient or population: Adults ≥ 18 years undergoing elective THR or knee replacement (unilateral, bilateral, total, unicompartmental)

Setting: Any setting that utilised a short-stay programme

Intervention: Short-stay

Comparison: Usual care

Outcome

№ of participants (studies)

Relative effect (95% CI)

Anticipated absolute effects (95% CI)

Certainty

What happens

Without Short-Stay

With Short-Stay

Difference

Blood transfusion

№ of participants: 57 (1 RCT)

OR 1.75 (0.27 to 11.36)

6.7%

11.1% (1.9 to 44.8)

4.4% more (4.8 fewer to 38.1 more)

Lowa,b

Short-stay programmes may result in little to no difference in blood transfusion

Other Complications

№ of participants: 147 (3 RCTs)

OR 0.63 (0.26 to 1.53)

23.0%

15.8% (7.2 to 31.3)

7.2% fewer (15.8 fewer to 8.4 more)

Lowb

Short-stay programmes may result in little to no difference in other complications

Hospital Readmissions

№ of participants: 98 (2 RCTs)

OR 0.95 (0.12 to 7.46)

4.0%

3.8% (0.5 to 23.7)

0.2% fewer (3.5 fewer to 19.7 more)

Lowb

Short-stay programmes may result in little to no difference in hospital readmissions

Stiffness and/or anipulation

№ of participants: 90 (2 RCTs)

OR 1.57 (0.18 to 13.26)

2.3%

3.5% (0.4 to 23.6)

1.2% more (1.9 fewer to 21.3 more)

Lowb

Short-stay programmes may result in little to no difference in stiffness and/or manipulation

Neurovascular Injury

№ of participants: 49 (1 RCT)

OR 0.31 (0.01 to 7.92)

4.2%

1.3% (0 to 25.6)

2.8% fewer (4.1 fewer to 21.4 more)

Lowa,b

Short-stay programmes may result in little to no difference in neurovascular injury

*The risk in the intervention group (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI)

CI confidence interval, OR odds ratio

GRADE Working Group grades of evidence

High certainty: we are very confident that the true effect lies close to that of the estimate of the effect

Moderate certainty: we are moderately confident in the effect estimate: the true effect is likely to be close to the estimate of the effect, but there is a possibility that it is substantially different

Low certainty: our confidence in the effect estimate is limited: the true effect may be substantially different from the estimate of the effect

Very low certainty: we have very little confidence in the effect estimate: the true effect is likely to be substantially different from the estimate of effect

  1. Explanations: aSmall event rate from a single study, bAlthough the RCTs were hampered by an inability to blind the interventions, this does not appear to bias the outcomes