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Table 4 Association between peak vGRF measures and injury risk for all LBP and gradual onset non-traumatic LBP

From: Performance in dynamic movement tasks and occurrence of low back pain in youth floorball and basketball players

 

Univariate

Adjusted

HR 95% CI

P value

HR95% CI

P value

Continuous variablesa

All LBP

  Peak vGRF, N/Kg

1.03 (0.97 to 1.11)

0.340

1.03 (0.96 to 1.11)

0.380

  Absolute Peak vGRF, N

1.00 (1.00 to 1.00)

0.760

1.00 (1.00 to 1.00)

0.870

  Peak vGRF asymmetry, N/Kg

1.00 (0.85 to 1.18)

0.990

1.00 (0.85 to 1.18)

0.990

  Absolute Peak vGRF asymmetry, N

1.00 (1.00 to 1.00)

0.970

1.00 (1.00 to 1.00)

0.940

Gradual onset non-traumatic LBP

  Peak vGRF, N/Kg

1.00 (1.00 to 1.00)

0.610

1.00 (1.00 to 1.00)

0.690

  Absolute Peak vGRF, N

1.04 (0.96 to 1.12)

0.370

1.03 (0.96 to 1.12)

0.420

  Peak vGRF asymmetry, N/Kg

1.03 (0.87 to 1.23)

0.720

1.02 (0.86 to 1.22)

0.810

  Absolute Peak vGRF asymmetry, N

1.00 (1.00 to 1.00)

0.710

1.00 (1.00 to 1.00)

0.790

Dichotomous variablesb(high vs. low)

All LBP

  Peak vGRF, N/Kg

1.92 (1.00 to 3.68)

0.051

1.83 (0.95 to 3.51)

0.070

  Absolute Peak vGRF, N

0.99 (0.53 to 1.83)

0.960

0.94 (0.51 to 1.76)

0.860

  Peak vGRF asymmetry, N/Kg

1.23 (0.66 to 2.30)

0.510

1.22 (0.65 to 2.27)

0.530

  Absolute Peak vGRF asymmetry, N

1.21 (0.65 to 2.25)

0.550

1.20 (0.64 to 2.23)

0.580

Gradual onset non-traumatic LBP

  Peak vGRF, N/Kg

1.47 (0.73 to 2.98)

0.610

1.41 (0.69 to 2.86)

0.340

  Absolute Peak vGRF, N

0.98 (0.49 to 1.97)

0.370

0.94 (0.47 to 1.88)

0.850

  Peak vGRF asymmetry, N/Kg

1.31 (0.65 to 2.64)

0.720

1.30 (0.64 to 2.61)

0.470

  Absolute Peak vGRF asymmetry, N

1.28 (0.64 to 2.58)

0.710

1.26 (0.63 to 2.54)

0.510

  1. HR Hazard ratio, CI confidence interval, LBP low back pain, vGRF vertical ground reaction force, N Newton;
  2. aAdjusted with history of LBP, leg dominance and nicotine use
  3. b All LBP: Adjusted with history of LBP and leg dominance. Gradual onset LBP: Adjusted with history of LBP
  4. Peak vGRF high > = 18.5, low< 18.5
  5. Absolute Peak vGRF high > = 1191.0, low< 1191.0
  6. Peak vGRF asymmetry high > = 1.6, low< 1.6
  7. Absolute Peak vGRF asymmetry high > = 103.3, low< 103.3
  8. Statistically significant results are indicated with bold