Table 3 Restricted set of candidate prognostic factors for model development and validation
Selection method | Candidate prognostic factor | Composite PF | Measurement unit | Number of parameters in model | Measurement method | Data type | Reliability (if applicable) |
|---|---|---|---|---|---|---|---|
Systematic review | Age | No | Years | 1 | Date of birth | Continuous | - |
Frequency of previous IMIs within 3 years prior to PHE | No | Freq. | 1 | Medical records | Discrete (treated as continuous) | - | |
Most recent previous IMI within 3 years prior to PHE | No | < 6 months, 6–12 months, > 12 months | 3 | Medical records | Categorical | - | |
Clinical reasoning/data quality | CMJ peak power | No | Watts | 1 | CMJ using force plates | Continuous | Test-retest ICC = 0.92–0.98 [36] |
PROM hip joint internal rotation difference* | Yes | Degrees | 1 | Digital inclinometer | Continuous | Intra-rater ICC = 0.90 [37] | |
PROM hip joint external rotation difference* | Yes | Degrees | 1 | Digital inclinometer | Continuous | Intra-rater ICC = 0.90 [37] | |
Hip flexor muscle length difference* | Yes | Degrees | 1 | Digital inclinometer - Thomas test | Continuous | Inter-rater ICC = 0.89 [38] | |
Hamstring muscle length /neural mobility difference* | Yes | Degrees | 1 | Digital inclinometer - SLR | Continuous | Intra-rater ICC =0.95–0.98 [39] Interrater ICC = 0.80–0.97 [40] | |
Calf muscle length difference* | Yes | Degrees | 1 | Digital inclinometer - WBL | Continuous | Inter-rater ICC = 0.80–0.95 [41, 42] Intra-rater = ICC 0.88 [42] | |
BMI | Yes | kg/m2 | 1 | Composite height (cm) and weight (kg) | Continuous | – |