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Table 3 Functional outcomes

From: Evaluation of the ‘Spaarne soft tissue procedure’ as a treatment for recurrent patellar dislocations: a four-in-one technique

  All knees No redislocations Redislocations   No subluxations Subluxations  
(n = 34) (n = 26) (n = 8) P-value (n = 21) (n = 13) P-value
IKDC subjective knee form, median (IQR) 54 (43–61) 55 (44–63) 49 (38–60) 0.34 54 (44–63) 53 (41–60) 0.57
LYSHOLM, median (IQR) 76 (56–85) 78 (63–86) 55 (46–73) 0.046 79 (64–87) 61 (49–81) 0.08
KUJALA, median (IQR) 81 (65–88) 83 (69–90) 69 (60–75) 0.06 84 (71–91) 73 (55–83) 0.07
TEGNER preoperative, median (IQR) 3 (2–6) 3 (2–6) 5 (1–7) 0.67 3 (2–7) 5 (2–7) 0.60
TEGNER postoperative, median (IQR) 3 (2–6) 4 (2–6) 2 (1–2) 0.03 1 (1–6) 2 (2–4) 0.17
SF-36
 Physical functioning, median (IQR) 78 (59–91) 85 (63–95) 75 (53–83) 0.18 85 (65–95) 70 (53–88) 0.31
 Pain, median (IQR) 50 (50–70) 50 (50–75) 50 (50–69) 0.61 50 (50–88) 50 (50–63) 0.51
 Physical role limitation, median (IQR) 83 (45–95) 90 (50–95) 48 (38–85) 0.052 90 (63–95) 50 (45–95) 0.15
 General health perception, median (IQR) 73 (53–84) 75 (62–84) 68 (46–83) 0.50 80 (65–85) 70 (40–75) 0.14
NRS rest, median (IQR) 1 (0–4) 0 (0–4) 2 (0–6) 0.25 0 (0–3) 2 (0–5) 0.23
NRS walking, median (IQR) 3 (0–5) 3 (0–5) 4 (2–7) 0.22 3 (0–5) 5 (0–7) 0.16
NRS sports, median (IQR) 5 (3–8) 5 (3–7) 8 (5–9) 0.09 4 (2–7) 7 (4–9) 0.07
Subjective occasional swelling, n (%)     0.34    0.27
 Never 16 (47%) 14 (54%) 2 (25%)   11 (52%) 5 (39%)  
 Occasionally 10 (29%) 7 (27%) 3 (38%)   7 (33%) 3 (23%)  
 Invalidating 8 (24%) 5 (19%) 3 (38%)   3 (14%) 5 (39%)  
Subjective instability, n (%)     0.03    0.01
 Never 17 (50%) 15 (58%) 2 (25%)   14 (67%) 3 (23%)  
 Occasionally 8 (24%) 7 (27%) 1 (13%)   5 (24%) 3 (23%)  
 Invalidating 9 (26%) 4 (15%) 5 (63%)   2 (10%) 7 (54%)  
Subjective crepitus, n (%)     0.26    0.65
 Never 11 (32%) 9 (35%) 2 (25%)   8 (38%) 3 (23%)  
 Occasionally 5 (15%) 5 (19%) 0 (0%)   3 (14%) 2 (15%)  
 Invalidating 18 (53%) 12 (46%) 6 (75%)   10 (48%) 8 (62%)  
  1. IQR Interquartile range, n Number of knees