Table 1 Demographics and perceived and predicted breast cancer risk of BREATHE's participants by their perceived risk at enrolment (low, normal, high)
|  | All n = 4112 | Perceived risk at enrolment | p | ||
|---|---|---|---|---|---|
Low | Normal | High | |||
n = 1797 | n = 1932 | n = 383 | |||
Median age at enrolment, years (IQR) | 48 (42 to 53) | 49 (43 to 53) | 47 (42 to 53) | 46 (40 to 51) |  < 0.001 |
Age category, years | Â | Â | Â | Â | Â |
 30 to 35 | 611 (15) | 230 (13) | 304 (16) | 77 (20) |  < 0.001 |
 40 to 49 | 1810 (44) | 753 (42) | 869 (45) | 188 (49) |  |
 50 to 59 | 1691 (41) | 814 (45) | 759 (39) | 118 (31) |  |
Ethnicity | Â | Â | Â | Â | Â |
 Chinese | 3203 (78) | 1303 (73) | 1587 (82) | 313 (82) |  < 0.001 |
 Malay | 430 (10) | 225 (13) | 170 (9) | 35 (9) |  |
 Indian | 268 (7) | 159 (9) | 95 (5) | 14 (4) |  |
 Other | 211 (5) | 110 (6) | 80 (4) | 21 (5) |  |
Employment status | Â | Â | Â | Â | Â |
 Currently employed | 3301 (80) | 1429 (80) | 1562 (81) | 310 (81) | 0.007 |
 Previously employed | 761 (19) | 334 (19) | 354 (18) | 73 (19) |  |
 Never employed | 50 (1) | 34 (2) | 16 (1) | 0 (0) |  |
Highest academic attained | Â | Â | Â | Â | Â |
 Primary and below | 203 (5) | 93 (5) | 96 (5) | 14 (4) |  < 0.001 |
 Secondary | 746 (18) | 367 (20) | 343 (18) | 36 (9) |  |
 Post-secondary | 1183 (29) | 519 (29) | 559 (29) | 105 (27) |  |
 University and above | 1980 (48) | 818 (46) | 934 (48) | 228 (60) |  |
Breast cancer screening | Â | Â | Â | Â | Â |
 Once a year | 911 (22) | 346 (19) | 442 (23) | 123 (32) |  < 0.001 |
 Once every two years | 1605 (39) | 768 (43) | 719 (37) | 118 (31) |  |
 Ever attended (not intend to continue) | 92 (2) | 43 (2) | 41 (2) | 8 (2) |  |
 Other | 190 (5) | 88 (5) | 83 (4) | 19 (5) |  |
 Non-regular screeners age < 50 years | 657 (16) | 278 (15) | 328 (17) | 51 (13) |  |
 Unknown | 657 (16) | 274 (15) | 319 (17) | 64 (17) |  |
I believe in the importance of breast cancer screening | |||||
 Strongly agree | 2419 (59) | 1057 (59) | 1116 (58) | 246 (64) | 0.061 |
 Agree | 1541 (37) | 669 (37) | 744 (39) | 128 (33) |  |
 Neither agree nor disagree | 140 (3) | 63 (4) | 69 (4) | 8 (2) |  |
 Disagree | 6 (0) | 6 (0) | 0 (0) | 0 (0) |  |
 Strongly disagree | 6 (0) | 2 (0) | 3 (0) | 1 (0) |  |
(At enrolment) What do you think is your chance of getting breast cancer? | |||||
 1 (Lowest) | 697 (17) | 697 (39) | 0 (0) | 0 (0) | – |
 2 | 589 (14) | 589 (33) | 0 (0) | 0 (0) |  |
 3 | 511 (12) | 511 (28) | 0 (0) | 0 (0) |  |
 4 (Average) | 1932 (47) | 0 (0) | 1932 (100) | 0 (0) |  |
 5 | 288 (7) | 0 (0) | 0 (0) | 288 (75) |  |
 6 | 74 (2) | 0 (0) | 0 (0) | 74 (19) |  |
 7 (Highest) | 21 (1) | 0 (0) | 0 (0) | 21 (5) |  |
(At follow-up) What do you think is your chance of getting breast cancer? | |||||
 1 (Lowest) | 627 (15) | 465 (26) | 144 (7) | 18 (5) |  < 0.001 |
 2 | 679 (17) | 379 (21) | 266 (14) | 34 (9) |  |
 3 | 580 (14) | 264 (15) | 272 (14) | 44 (11) |  |
 4 (Average) | 1805 (44) | 588 (33) | 1062 (55) | 155 (40) |  |
 5 | 350 (9) | 86 (5) | 164 (8) | 100 (26) |  |
 6 | 55 (1) | 12 (1) | 18 (1) | 25 (7) |  |
 7 (Highest) | 16 (0) | 3 (0) | 6 (0) | 7 (2) |  |
Predicted risk | Â | Â | Â | Â | Â |
 Below-average | 1650 (40) | 714 (40) | 790 (41) | 146 (38) |  < 0.001 |
 Average | 1185 (29) | 599 (33) | 534 (28) | 52 (14) |  |
 Above average | 1277 (31) | 484 (27) | 608 (31) | 185 (48) |  |
I am confident that my breast cancer risk classification in my report is reliable | |||||
 Strongly agree | 885 (22) | 445 (25) | 368 (19) | 72 (19) |  < 0.001 |
 Agree | 2493 (61) | 1074 (60) | 1189 (62) | 230 (60) |  |
 Neither agree nor disagree | 674 (16) | 250 (14) | 349 (18) | 75 (20) |  |
 Disagree | 29 (1) | 12 (1) | 13 (1) | 4 (1) |  |
 Strongly disagree | 31 (1) | 16 (1) | 13 (1) | 2 (1) |  |