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Table 2 Case-mix in relation to seniority of surgeon

From: Experience versus complication rate in third molar surgery

Category Description Surgeon X2 (df) P-value
   Resident n (%) Specialist n (%)   
Patient gender Male 215 (41.5) 286 (50.3)   
  Female 303 (58.5) 283 (49.7) 8.37 (1) 0.004
Degree of impaction of 3rd molar Fully erupted 60 (11.6) 44 (7.7)   
  Partially erupted 424 (81.9) 433 (76.1)   
  Fully impacted 34 (6.6) 92 (16.2) 26.92 (2) <0.001
Proximity to inferior alveolar nerve > 2 mm 103 (19.9) 141 (24.8)   
  <= 2 mm 415 (80.1) 428 (75.2) 3.73 (1) 0.053
Patient age group 17–20 years 139 (26.8) 156 (27.4)   
  21–25 years 257 (49.6) 273 (48.0)   
  26–30 years 77 (14.9) 75 (13.2)   
  31+ years 45 (8.7) 65 (11.4) 2.74 (3) 0.434
Total number of cases treated 518 (100.0) 569 (100.0)