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Table 2 Comparison of lateral insertion group and medial insertion group

From: Lateral insertion is a good prognostic factor after in situ fixation in slipped capital femoral epiphysis

  Lateral group (28 hips) Medial group (25 hips) p value
Age (years) 12.0 11.7 0.274*
BMI 23.9 25.6 0.113*
PTA at ISF (degrees) 29.6 37.7 0.004*
PTA at physeal closure (degrees) 30.8 41.6 0.001*
Progression of PTA (degrees) 1.2 3.9 0.001*
Ouctome (slip retention: slip progression) 25:3 14:11 0.011§
SCFE type (acute: acute on chronic: chronic) 8:9:11 4:3:18 0.053¶
Stability (stable: unstable) 25:3 23:2 1.000§
Screw position (1:2:3)† 19:6:3 10:13:2 0.067¶
Distribution of threads (1:2)‡ 12:16 8:17 0.571§
Time for full-weight bearing (weeks) 4.0 4.9 0.378*
Time for physeal closure (months) 13.5 12.4 0.513*
  1. †1 point, the central axis of the screw is located over the center line of the femoral head or within a distance equal to one-half the diameter of the screw; 2 points, the distance between the axis of the screw and center line of the femoral head is between one-half and one screw-diameter; and 3 points, the axis of the screw is located more than one screw-diameter from the center line of the femoral head. ‡1 point, 40-60% of the threads engage the physis; 2 points, < 40% or > 60% of the threads engage the physis.
  2. *Mann-Whitney’s U test, ¶Pearson’s χ2 test, §Fisher’s exact probability test.