Table 5.
Stage distribution of breast cancer cases by region
| Clinical Stage |
Total | More Developed Regions** | Less Developed Regions*** | P* | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| North | South | East | Sub-total | Northeast | Central | North-West | South-West | Sub-total | |||||||||||||
| N | % | N | % | N | % | N | % | N | % | N | % | N | % | N | % | N | % | N | % | ||
| Stage I | 663 | 15.7 | 172 | 26.8 | 98 | 16.2 | 95 | 15.7 | 365 | 19.9 | 131 | 15.8 | 73 | 13.4 | 77 | 15.9 | 17 | 3.4 | 298 | 12.7 | |
| Stage II | 1891 | 44.9 | 280 | 43.7 | 243 | 40.2 | 239 | 39.4 | 762 | 41.6 | 323 | 38.8 | 400 | 73.3 | 170 | 35.2 | 236 | 47.3 | 1129 | 48.3 | |
| Stage III | 788 | 18.7 | 93 | 14.5 | 117 | 19.4 | 152 | 25.1 | 362 | 19.8 | 119 | 14.3 | 53 | 9.7 | 127 | 26.3 | 127 | 25.5 | 426 | 18.2 | < 0.001 |
| Stage IV | 113 | 2.7 | 2 | 0.3 | 20 | 3.3 | 5 | 0.8 | 27 | 1.5 | 4 | 0.5 | 3 | 0.6 | 56 | 11.6 | 23 | 4.6 | 86 | 3.7 | |
| Unknown | 756 | 18.0 | 94 | 14.7 | 126 | 20.9 | 115 | 19.0 | 335 | 18.3 | 255 | 30.7 | 17 | 3.1 | 53 | 11.0 | 96 | 19.2 | 421 | 18.0 | |
* Stage distribution in more developed regions vs. less developed regions
** More Developed Regions: North, South, and East
***Less Developed Regions: Northeast, Central, North-West, South-West.