Table 5 GRADE scores for each predictive variable
Summary of Results | GRADE Assessment | |||||||
|---|---|---|---|---|---|---|---|---|
Factors that may decrease the quality | Factors that may increase the quality | Quality | ||||||
Preoperative Predictive Factor | Number of Participants (studies) | Study Limitations | Inconsistency | Indirectness | Imprecision | Moderate/large effect size | Dose effect | |
Physical activity rating scale 1) Tegner 2) Marx | 403 (4) | High/moderate risk of bias using QUIPS | Inconsistencyb | Indirectnessc | No imprecision | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Knee specific patient reported outcome measure 1) Lysholm 2) IKDC 3) ‘Knee function’ (measured using two questions from the IKDC) 4) Noyes | 164 (2) | High risk of bias using QUIPS | Inconsistencyb | Indirectnessc | Imprecisione | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Passive knee range of motion | 64 (1) | High risk of bias using QUIPS | Inconsistencya | Indirectnessd | Imprecisione | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Thigh muscle torque | 64 (1) | High risk of bias using QUIPS | Inconsistencya | Indirectnessd | Imprecisione | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Anterior knee pain | 64 (1) | High risk of bias using QUIPS | Inconsistencya | Indirectnessd | Imprecisione | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Weight | 179 (2) | High/moderate risk of bias using QUIPS | Inconsistencyb | Indirectnessc | Imprecisionef | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
BMI | 278 (2) | High risk of bias using QUIPS | Inconsistencyb | Indirectnessc | Imprecisiong | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Graft type | 64 (1) | High risk of bias using QUIPS | Inconsistencya | Indirectnessd | Imprecisione | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Psychovitality | 100 (1) | High risk of bias using QUIPS | Inconsistencya | No indirectness | Imprecisione | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Estimation of time (number of months) to achieve postoperative outcomes markers | 65 (1) | Moderate risk of bias using QUIPS | Inconsistencya | No indirectness | Imprecisione | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Goal to return to preinjury level | 65 (1) | Moderate risk of bias using QUIPS | Inconsistencya | No indirectness | Imprecisione | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Estimation of ability to return to preinjury level | 65 (1) | Moderate risk of bias using QUIPS | Inconsistencya | No indirectness | Imprecisione | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Knee Self-Efficacy Scale (K-SES) | 38 (1) | High risk of bias using QUIPS | Inconsistencya | No indirectness | Imprecisione | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Time to surgery | 119 (2) | High/moderate risk of bias using QUIPS | Inconsistencyb | Indirectnessc | Imprecisiong | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |
Smoking status | 55 (1) | Moderate risk of bias using QUIPS | Inconsistencya | Indirectnessd | Imprecisione | No moderate or large effect size | No exposure-response gradient | \(\oplus\)◯◯◯ Very low |