Research Article
Risk of Colorectal Cancer in Ulcerative Colitis Patients: A Systematic Review and Meta-Analysis
Table 6
Geographic variation in UC patients in different disease durations.
| Area | 1-9 years | 10-20 years | 21-30 years | More than 30 years |
| Asia | 0.0032 [0.0022; 0.0045] | 0.0128 [0.0081; 0.0201]▲ | 0.0188 [0.0051; 0.0671]▲ | 0.0106 [0.0013; 0.0819]▲ | North America | 0.0043 [0.0009; 0.0196] | 0.0120 [0.0058; 0.0245] | — | 0.0228 [0.0132; 0.0390]▲ | Europe | 0.0097 [0.0020; 0.0461] | 0.0141 [0.0089; 0.0221] | 0.0222 [0.0104; 0.0465] | 0.0193 [0.0144; 0.0257] | Oceania | — | 0.048 [0.029; 0.066] | — | — |
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▲ vs. 1-9 years; ▲▲ vs. 1-9 years. |