Article Figures & Data
Figures
- Figure 1. Flow through the survey
- Figure 2. Dynamic forced-choice staircases
CC = colonoscopy. CRC = colorectal cancer. FIT = faecal immunochemical test. Max = maximum.
- Figure 3. Switching point for responders’ faecal immunochemical test (FIT) preference over colonoscopy (CC) (n = 1057).
Those who preferred FIT over CC in choice one were asked to choose between a CC that misses 1% of colorectal cancers (CRCs) and an alternative FIT that misses 2% of CRCs in choice 2. Participants who kept choosing FIT over CC were presented with new scenarios in which the number of CRCs missed by FIT increased constantly by 2%. In the final scenario, FIT was reported to miss 10% of CRCs. The method let the authors infer the maximum acceptable number of CRCs missed by FIT.
Tables
- Table 1. Study sample‘s sociodemographic variables and symptoms in the last three weeks (n = 1057)
Aged 40–49 years, n (%) Aged 0–59 years, n (%) Total, n (%) P value Sex Men 281 (54.5) 283 (52.3) 564 (53.4) 0.484 Women 235 (45.5) 258 (47.7) 493 (46.6) Marital status Single or divorced or separated 166 (32.2) 196 (36.2) 362 (34.2) 0.165 Married or cohabiting 350 (67.8) 345 (63.8) 695 (65.8) Education No A-levels 170 (32.9) 225 (41.6) 395 (37.4) 0.004 A-levels 346 (67.1) 316 (58.4) 662 (62.6) Paid employment No 109 (21.1) 201 (37.2) 310 (29.3) <0.001 Yes 407 (78.9) 340 (62.8) 747 (70.7) Ethnic group White 461 (89.3) 510 (94.3) 971 (91.9) 0.003 BAME 55 (10.7) 31 (5.7) 86 (8.1) Numeracy question Wrong 227 (44.0) 241 (44.5) 468 (44.3) 0.856 Correct 289 (56.0) 300 (55.5) 589 (55.7) Own perceived risk Lower 87 (16.9) 91 (16.8) 178 (16.8) 0.436 Same 369 (71.5) 400 (73.9) 769 (72.8) Higher 60 (11.6) 50 (9.2) 110 (10.4) Constipation Not at all 429 (83.1) 424 (78.7) 853 (80.9) 0.065 Occ/frequ 87 (16.9) 115 (21.3) 202 (19.1) Diarrhoea Not at all 411 (80.0) 430 (79.6) 841 (79.8) 0.893 Occ/frequ 103 (20.0) 110 (20.4) 213 (20.2) Bowel incontinence Not at all 500 (97.3) 521 (96.5) 1021 (96.9) 0.459 Occ/frequ 14 (2.7) 19 (3.5) 33 (3.1) Indigestion Not at all 533 (79.8) 491 (73.9) 1024 (76.8) 0.024 Occ/frequ 245 (20.2) 270 (26.1) 515 (23.2) BAME = black and minority ethnic. Occ/frequ = occassionally or frequently
Logistic model: not wanting any test Ordinal model: switching point Odds ratio 95% CI Odds ratio 95% CI Sex Male Ref Ref Female 0.813 0.555 to 1.192 1.413 1.109 to 1.800a Age, years 40–49 Ref Ref 50–59 0.821 0.564 to 1.194 1.008 0.792 to 1.282 Education No A-levels Ref Ref A-levels 0.864 0.586 to 1.274 1.222 0.950 to 1.572 Paid employment Yes Ref Ref No 1.294 0.865 to 1.938 1.208 0.925 to 1.579 Marital status Single or divorced or separated Ref Ref Married or cohabiting 0.937 0.640 to 1.373 0.807 0.629 to 1.035 Ethnic group White Ref Ref BAME 3.492 2.071 to 5.888a 0.676 0.402 to 1.134 Numeracy question Correct Ref Ref Wrong 2.539 1.737 to 3.712a 0.736 0.576 to 0.940b Own perceived risk Lower Ref Ref Same 1.178 0.700 to 1.981 0.983 0.719 to 1.343 Higher 2.352 1.199 to 4.617b 0.546 0.336 to 0.887b Constipation Not at all Ref Ref Occasionally 1.056 0.637 to 1.751 0.848 0.614 to 1.169 Diarrhoea Not at all Ref Ref Occasionally 0.856 0.514 to 1.424 0.939 0.691 to 1.277 Bowel incontinence Not at all Ref Ref Occasionally 0.396 0.087 to 1.810 0.588 0.296 to 1.166 Indigestion Not at all Ref Ref Occasionally 0.769 0.476 to 1.242 1.572 1.178 to 2.097a 1048 903 a P<0.01. b P<0.05.
BAME = black and minority ethnic. CI = confidence intervals. Ref = reference.
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Public preferences for using quantitative faecal immunochemical test versus colonoscopy as diagnostic test for colorectal cancer: evidence from an online survey
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