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Table 3 Comparison of information on execution of thyroid surgery (A), lymph node dissection (B) and administration of radioiodine (C) between administrative data sources

From: Combining data to perform population-based observational studies: know your sources. The case of thyroid cancer in Belgium

A.   HIC    B.   HIC   
   yes no total    yes no total
PAT yes 2140 121 2261 PAT yes 414 193 607
  no 55 84 139   no 116 1677 1793
  total 2195 205 2400   total 530 1870 2400
   MDT    C.   HIC   
   yes no total    yes no total
PAT yes 1574 173 1747 MDT yes 678 215 893
  no 37 35 72   no 208 718 926
  total 1611 208 1819   total 886 933 1819
   HIC        
   yes no total      
MDT yes 1516 95 1611      
  no 158 50 208      
  total 1674 145 1918      
  1. HIC health insurance companies; MDT multidisciplinary team meeting reports; PAT full text pathology reports
  2. Surgery according to HIC corresponds to surgery performed from 3 months before incidence until 3 months after incidence.
  3. Lymph node dissection according to HIC corresponds to all lymph node dissections without timeframe.
  4. Isotope administration according to HIC corresponds to high activity radioiodine (30 mCi or more) administration after thyroidectomy.