Table 2 Inaccurate self-reports by screening test among respondents
Phone | ||||||
|---|---|---|---|---|---|---|
Intention | No intention | P-value†† | Intention | No intention | P-value†† | |
All responders, N | 914 | 838 | 956 | 930 | ||
FOBT, N with/without documented test | 76/838 | 84/754 | 62/894 | 73/857 | ||
n (%) false negatives | 47 (61.8%) | 62 (73.8%) | 0.10 | 37 (59.7%) | 37 (50.7%) | 0.30 |
n (%) false positives | 168 (20.1%) | 141 (18.7%) | 0.50 | 186 (20.8%) | 179 (20.9%) | 0.97 |
Sigmoidoscopy, N with/without documented test | 449/465 | 426/412 | 373/583 | 356/574 | ||
n (%) false negatives | 159 (35.4%) | 147 (34.5%) | 0.78 | 152 (40.8%) | 142 (39.9%) | 0.81 |
n (%) false positives | 74 (15.9%) | 76 (18.5%) | 0.32 | 63 (10.8%) | 72 (12.5%) | 0.36 |
Colonoscopy, N with/without documented test | 755/159 | 660/178 | 691/265 | 648/282 | ||
n (%) false negatives | 111 (14.7%) | 92 (13.9%) | 0.68 | 89 (12.9%) | 85 (13.1%) | 0.90 |
n (%) false positives | 30 (18.9%) | 27 (15.2%) | 0.37 | 60 (22.6%) | 51 (18.1%) | 0.19 |
CT colonography, N with/without documented test | 30/884 | 21/817 | 24/932 | 25/905 | ||
n (%) false negatives | 6 (20.0%) | 10 (47.6%) | 0.064* | 4 (16.7%) | 11 (44.0%) | 0.062* |
n (%) false positives | 60 (6.8%) | 44 (5.4%) | 0.23 | 31 (3.3%) | 32 (3.5%) | 0.80 |
Barium enema, N with/without documented test | 25/889 | 15 / 823 | 22/934 | 14/916 | ||
n (%) false negatives | 5 (20.0%) | 1 (6.67%) | 0.38* | 0 (0%) | 0 (0%) | -- |
n (%) false positives | 286 (32.2%) | 268 (32.6%) | 0.86 | 220 (23.6%) | 221 (24.1%) | 0.77 |
Any screening †, N with/without documented test | 794/120 | 716/122 | 733/223 | 686/244 | ||
n (%) false negatives | 36 (4.5%) | 33 (4.6%) | 0.94 | 49 (6.7%) | 29 (4.2%) | 0.04 |
n (%) false positives | 41 (34.2%) | 36 (29.5%) | 0.44 | 85 (38.1%) | 85 (34.8%) | 0.46 |