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Table 2 Agreement in accuracy level (Cohen’s Kappa coefficient) for methods A and B (automatic geocoding) in comparison with method R (manual reference method)

From: Accuracy of two geocoding methods for geographic information system-based exposure assessment in epidemiological studies

  Method R Method A Method B
City
(N addresses)
Street segment
(N addresses)
Address
(N addresses)
Total
(N addresses)
Cohen's kappa coefficient Postal code
(N addresses)
Street segment (N addresses) Address
(N addresses)
Total
(N addresses)
Cohen's kappa coefficient
Overall Town Hall 147 20 14 181 0.60 133 49 5 187 0.61
Street segment 212 309 140 661 119 439 131 689
Address 46 34 1294 1374 125 70 1354 1549
Total 405 363 1448 2216   377 558 1490 2425  
For urban addressesa Town Hall 62 10 11 83 0.56 54 27 5 86 0.52
Street segment 94 166 130 390 64 226 126 416
Address 44 26 1265 1335 114 63 1331 1508
Total 200 202 1406 1808   232 316 1462 2010  
For rural addressesa Town Hall 85 10 3 98 0.39 79 22 0 101 0.54
Street segment 118 143 10 271 55 213 5 273
Address 2 8 29 39 11 7 23 41
Total 205 161 42 408   145 242 28 415  
For 1990–2000 period addresses Town Hall 133 17 13 163 0.61 125 45 5 175 0.60
Street segment 182 278 120 580 112 396 117 625
Address 45 29 1141 1215 121 67 1216 1404
Total 360 324 1274 1958   358 508 1338 2204  
For 2000–2008 period addresses Town Hall 14 3 1 18 0.56 8 4 0 12 0.70
Street segment 30 31 20 81 7 43 14 64
Address 1 5 153 159 4 3 138 145
Total 45 39 174 258   19 50 152 221  
  1. aAssignment of urban and rural status of addresses was based on definitions established by the French national institute for statistics and economic studies (INSEE)