Demographic comparison between those with a negative and positive guaiac faecal occult blood test result
| Negative result (n=131 207) | Positive result (n=2714) | Comparison of positive and negative groups | |
| N (%) | N (%) | P value* | |
| Females | 69 987 (98.5) | 1056 (1.5) | |
| Males | 61 220 (97.4) | 1658 (2.6) | <0.001 |
| Age at screening (median, IQR) | 54 (50–62) | 58 (52–65) | <0.0001 |
| Age group at screening (years) | |||
| 50–54 | 66 778 (98.5) | 992 (1.5) | |
| 55–59 | 23 242 (97.8) | 520 (2.2) | |
| 60– 64 | 19 948 (97.5) | 511 (2.5) | |
| 65–69 | 17 190 (97.0) | 526 (3.0) | |
| 70+ | 4049 (96.1) | 165 (3.9) | < 0.0001 |
| SIMD 1 (most deprived) | 15 505 (96.8) | 514 (3.2) | |
| 2 | 17 169 (97.5) | 440 (2.5) | |
| 3 | 23 169 (97.8) | 481 (2.0) | |
| 4 | 45 704 (98.2) | 819 (1.8) | |
| 5 (least deprived) | 28 790 (98.5) | 444 (1.5) | <0.0001 |
| Prescriptions for: | |||
| Aspirin | 21 540 (16.4) | 596 (21.9) | <0.0001 |
| Medicines that can cause bleeding† | 24 163 (18.4) | 796 (29.3) | |
| <0.0001 | |||
| Died (at 31/03/2016) | 12 632 (9.6) | 594 (21.9) | <0.0001 |
| Age died (median, IQR) | 71 (65–76) | 70 (64–75) | 0.002 |
*χ² test or Wilcoxon rank sum test.
†Includes aspirin.
SMID, Scottish Index of Multiple Deprivation.