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Table 1 Demographics and clinical results

From: Subtrochanteric shortening osteotomy during cementless total hip arthroplasty in young patients with severe developmental dysplasia of the hip

Indicator Pre-op clinical features Overall (Pre-op) Overall (Post-op) P Valuea
Crowe Type-III Crowe Type-IV
No. of hips 8 48 56 56  
Gender (No. of pts)
 Male 0 9 9  
 Female 8 34 40  
Affected side (No. of hips)
 Left 3 21 24  
 Right 5 17 22  
 Bilateral 0 10 10  
Harris Hip Score
 Mean in points (range) 54.6 (48–59) 38.2 (23–57) 40.6 (23–59) 87.4 (77–98) <0.01
 Rating (no. of hips)      
  Excellent (90–100 points) 0 0 0 15  
  Good (80–89 points) 0 0 0 39  
  Fair (70–79 points) 0 0 0 2  
  Poor (<70) 8 48 56 0  
PMA
 Mean in points (range) 7.6 (6–9) 6.5 (4–9) 6.6 (4–12) 16 (14–18) <0.01
  Pain 2.5 (2–3) 2.1 (1–4) 2.2 (1–4) 5.5 (5–6) <0.01
  Motion 2.4 (2–3) 2.3 (1–3) 2.3 (1–3) 5.2 (5–6) <0.01
  Function 2.6 (2–3) 2.0 (1–3) 2.1 (1–3) 5.3 (4–6) <0.01
 Rating (no. of hips)
  Excellent (18 points) 0 0 0 6  
  Good (15–18 points) 0 0 0 43  
  Fair (12–15 points) 0 0 0 7  
  Poor (<12 points) 8 48 56 0  
Limp (no. of Pts.)
 Severe 3 28 31 0  
 Moderate 4 15 19 3  
 Slight 1 5 6 11  
 None 0 0 0 42  
Limb-length discrepancy
 Mean in mm (range) 2.8 (2.1–3.7) 4.4 (2.3–6.5) 4.2 (2.1–6.5) 1.1 (0.6–1.4) <0.01
   < 1 cm (no. of hips) 0 0 0 24  
  1–2 cm (no. of hips) 0 0 0 32  
  2–3 cm (no. of hips) 5 4 9 0  
  3–4 cm (no. of hips) 3 13 16 0  
  4–5 cm (no. of hips) 0 18 18 0  
  5–6 cm (no. of hips) 0 10 10 0  
   > 6 cm (no. of hips) 0 3 3 0  
HOOS subscale scores
 Symptoms 10.8 (8–12) 8.8 (4–12) 9.1 (4–12) 16.6 (14–19) <0.01
 Pain 20.6 (17–24) 15.9 (6–23) 16.6 (6–24) 36.5 (34–40) <0.01
 Activities of daily living 34.1 (32–37) 28.7 (19–36) 29.4 (19–37) 60.9 (57–67) <0.01
 Sports and recreation 7.4 (5–8) 5.5 (3–8) 5.8 (3–8) 12.8 (10–16) <0.01
 Quality of life 6.9 (5–8) 5 (3–8) 5.3 (3–8) 13.7 (12–16) <0.01
Trendelenburg sign (no. of hips)
 Yes 6 47 53 1  
 No 2 1 3 55  
SF-12
 PCS 15.5 (12–17) 10.9 (6–16) 11.6 (6–17) 22.7 (19–25) <0.01
 MCS 18.3 (15–20) 13.8 (9–19) 14.4 (9–20) 25.6 (22–29) <0.01
  1. Values are expressed as mean with range
  2. MAP Merle d’Aubigne and Postel, PCS Physical component summary, MCS Mental component summary, ROM range of motion, HOOS Hip dysfunction and Osteoarthritis Outcome Score
  3. a P < 0.05 is significant