Demographic and baseline characteristics in the chronic cough cohort
| Parameter | Number (%) of individuals | |||||||||||||||
| Age (years) | Total | |||||||||||||||
| 18–24 (n=1509) | 25–29 (n=1336) | 30–34 (n=1700) | 35–39 (n=2210) | 40–44 (n=2460) | 45–49 (n=2781) | 50–54 (n=3159) | 55–59 (n=3560) | 60–64 (n=3951) | 65–69 (n=4373) | 70–74 (4350) | 75–79 (n=3965) | 80–84 (n=3722) | 85–89 (n=2545) | 90+ (n=1832) | (n=43 453) | |
| Gender | ||||||||||||||||
| Male | 703 (46.6) | 485 (36.3) | 621 (36.5) | 800 (36.2) | 962 (39.1) | 1167 (42.0) | 1343 (42.5) | 1502 (42.2) | 1738 (44.0) | 2010 (46.0) | 2017 (46.4) | 1882 (47.5) | 1735 (46.6) | 1197 (47.0) | 726 (39.6) | 18 888 (43.5) |
| Female | 806 (53.4) | 851 (63.7) | 1079 (63.6) | 1410 (63.8) | 1498 (60.9) | 1614 (58.0) | 1816 (57.5) | 2058 (57.8) | 2213 (56.0) | 2363 (54.0) | 2333 (53.6) | 2083 (52.5) | 1987 (53.4) | 1348 (53.0) | 1106 (60.4) | 24 565 (56.5) |
| BMI (kg/m2) | ||||||||||||||||
| BMI recorded | 960 (63.6) | 993 (74.3) | 1281 (75.4) | 1616 (73.1) | 2055 (83.5) | 2398 (86.2) | 2790 (88.3) | 3096 (87.0) | 3522 (89.1) | 3935 (90.0) | 3912 (89.9) | 3570 (90.0) | 3250 (87.3) | 2164 (85.0) | 1346 (73.5) | 36 888 (84.9) |
| <18.5 | 103 (10.7) | 50 (5.0) | 53 (4.1) | 49 (3.0) | 41 (2.0) | 44 (1.8) | 51 (1.8) | 71 (2.3) | 92 (2.6) | 104 (2.6) | 131 (3.4) | 173 (4.9) | 163 (5.0) | 154 (7.1) | 170 (12.6) | 1449 (3.9) |
| ≥18.5 and <25 | 462 (48.1) | 460 (46.3) | 481 (37.6) | 496 (30.7) | 558 (27.2) | 572 (23.9) | 608 (21.8) | 668 (21.6) | 857 (24.3) | 1033 (26.3) | 1145 (29.3) | 1170 (32.8) | 1138 (35.0) | 847 (39.1) | 624 (46.4) | 11 119 (30.1) |
| ≥25 and <30 | 209 (21.9) | 238 (24.0) | 391 (30.5) | 538 (33.3) | 734 (35.7) | 858 (35.8) | 987 (35.4) | 1107 (35.8) | 1260 (35.8) | 1456 (37.0) | 1373 (35.1) | 1246 (34.9) | 1183 (36.4) | 708 (32.7) | 371 (27.6) | 12 659 (34.3) |
| ≥30 and <40 | 148 (15.4) | 187 (18.8) | 291 (22.7) | 455 (28.2) | 600 (29.2) | 771 (32.2) | 973 (34.9) | 1059 (34.2) | 1124 (31.9) | 1155 (29.4) | 1113 (28.5) | 898 (25.2) | 695 (21.4) | 421 (19.5) | 165 (12.3) | 10 055 (27.3) |
| ≥40 | 38 (4.0) | 58 (5.8) | 65 (5.1) | 78 (4.8) | 122 (5.9) | 153 (6.4) | 171 (6.1) | 191 (6.2) | 189 (5.4) | 187 (4.8) | 150 (3.8) | 83 (2.3) | 71 (2.2) | 34 (1.6) | 16 (1.2) | 1606 (4.4) |
| Smoking status | ||||||||||||||||
| Status recorded | 411 | 552 | 649 | 861 | 977 | 1199 | 1414 | 1629 | 1783 | 2018 | 2144 | 2009 | 1730 | 1124 | 710 | 19 210 |
| Current | 266 | 364 | 404 | 518 | 540 | 721 | 825 | 927 | 961 | 980 | 932 | 835 | 705 | 433 | 260 | 9671 |
| Ex-smoker | 78 | 130 | 161 | 217 | 311 | 373 | 470 | 602 | 709 | 907 | 1104 | 1092 | 962 | 650 | 422 | 8188 |
| Non-smoker | 67 | 58 | 84 | 126 | 126 | 105 | 119 | 100 | 113 | 131 | 108 | 82 | 63 | 41 | 28 | 1351 |
| Comorbidity | ||||||||||||||||
| None | 709 (47.0) | 487 (36.5) | 683 (40.2) | 794 (35.9) | 866 (35.2) | 888 (31.9) | 952 (30.1) | 1039 (29.2) | 1188 (30.1) | 1182 (27.0) | 1152 (26.5) | 976 (24.6) | 984 (26.4) | 754 (29.6) | 697 (38.1) | 13 351 (30.7) |
| Asthma | 348 (23.1) | 333 (24.9) | 364 (21.4) | 499 (22.6) | 587 (23.9) | 688 (24.7) | 908 (28.7) | 1058 (29.7) | 1075 (27.2) | 1201 (27.5) | 1133 (26.1) | 1075 (27.1) | 1086 (29.2) | 677 (26.6) | 403 (22.0) | 11 435 (26.3) |
| COPD | 32 (2.1) | 42 (3.1) | 61 (3.6) | 109 (4.9) | 161 (6.5) | 233 (8.4) | 375 (11.9) | 553 (15.5) | 757 (19.2) | 925 (21.2) | 1121 (25.8) | 1116 (28.2) | 998 (26.8) | 665 (26.1) | 361 (19.7) | 7509 (17.3) |
| GERD | 75 (5.0) | 112 (8.4) | 145 (8.5) | 239 (10.8) | 276 (11.2) | 350 (12.6) | 473 (15.0) | 545 (15.3) | 607 (15.4) | 764 (17.5) | 753 (17.3) | 753 (19.0) | 654 (17.6) | 377 (14.8) | 231 (12.6) | 6354 (14.6) |
| Rhinitis | 238 (15.8) | 188 (14.1) | 272 (16.0) | 366 (16.6) | 398 (16.2) | 386 (13.9) | 433 (13.7) | 453 (12.7) | 456 (11.5) | 516 (11.8) | 453 (10.4) | 366 (9.2) | 319 (8.6) | 174 (6.8) | 93 (5.1) | 5111 (11.8) |
| Total with comorbidity | 693 (46.0) | 675 (50.5) | 842 (49.5) | 1213 (54.9) | 1422 (57.8) | 1657 (59.6) | 2189 (69.3) | 2609 (73.3) | 2895 (73.3) | 3406 (77.9) | 3460 (79.5) | 3310 (83.5) | 3057 (82.1) | 1893 (74.4) | 1088 (59.4) | 30 409 (70.0) |
BMI, body mass index; COPD, chronic obstructive pulmonary disease; GERD, Gastroesophageal Reflux Disease.