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Table 3 Category of Read codes used to record knee problems for patient presentations when stratified by age group, sex and socio-economic deprivation, n (%)

From: Consultation patterns of children and adolescents with knee pain in UK general practice: analysis of medical records

   Symptom Diagnosis Row total, n (%)
Trauma Non-trauma
Age* 3 to 7 years, n (%) 28 (77.8) 8 (22.2) 36 (11.0)
   8 (22.2) 0 (0)  
8 to 11 years, n (%) 35 (71.4) 14 (28.6) 49 (15.0)
   12 (24.5) 2 (4.1)  
12 to 15 years, n (%) 91 (65.5) 48 (34.5) 139 (42.5)
   42 (30.2) 6 (4.3)  
16 to 19 years, n (%) 64 (62.1) 39 (37.9) 103 (31.5)
   35 (34.0) 4 (3.9)  
  Column total, n (%) 218 (66.7) 109 (33.3) 327 (100)
    97 (29.7) 12 (3.7)  
Sex      
Boy, n (%) 125 (64.8) 68 (35.2) 193 (59.0)
   61 (31.6) 7 (3.6)  
Girl, n (%) 93 (69.4) 41 (30.6) 134 (41.0)
   36 (26.9) 5 (3.7)  
  Column total, n (%) 218 (66.7) 109 (33.3) 327 (100)
    97 (29.7) 12 (3.7)  
Area of socio-economic deprivation Low, n (%) 59 (73.8) 21 (26.3) 80 (25.5)
   18 (22.5) 3 (3.8)  
Medium, n (%) 125 (69.1) 56 (30.9) 181 (57.6)
   50 (27.6) 6 (3.3)  
High, n (%) 25 (47.2) 28 (52.8) 53 (16.9)
   25 (47.2) 3 (5.7)  
Missing, n (%) 9 (69.2) 4 (30.8) 13 (4.0)
   4 (30.8) 0  
  Column total, n (%) 209 (66.6) 105 (33.4) 314 (100)
    93 (29.6) 12 (3.8)  
  1. Patient presentations: Number of patients who consulted on at least one occasion in 2010, n = 327
  2. Bolded numbers = cells with significant adjusted standardized residuals greater than +1.96 (observed frequency is more than the expected frequency)
  3. NB: Chi Square tests were applied to test for differences between the stratified groups by symptom or diagnosis (no analysis was carried out on the sub-category of trauma / non-trauma as cell numbers were considered too low, n < 5). Data for diagnosis: non-trauma are presented for reader interest
  4. * X 2 = 3.541, df = 3, p = 0.315
  5. X 2 = 0.765, df = 1, p = 0.382
  6. X 2 = 11.32, df = 2, p = 0.003