Multiplex RT-PCR-based detections of CEA, CK20 and EGFR in colorectal cancer patients

Figure 2 Kaplan-Meier analysis comparing the overall survival of patient groups as developed according to transcript detection patterns for carcinoembryonic antigen, cytokeratin 20 and epidermal growth factor receptor. Group 1: Carcinoembryonic antigen (CEA) positive; Group 2: Positive for 2 markers (CEA and cytokeratin 20); Group 3: Positive for all markers; Group 4: Combination of groups 1 and 2; Group 5: Combination of groups 2 and 3. Log Rank test P values were as follows: Groups 1 vs 3: P = 0.002; Groups 2 vs 3: P = 0.007; Groups 4 vs 3: P = 0.001; Groups 1 vs 5: P = 0.041; Groups 1 vs 2: P = 0.116.