TABLE I.
BASELINE CHARACTERISTICS OF COHORT MEMBERS (MEAN AND STANDARD DEVIATION OR NUMBER AND %) BY HISTORY OF RHINOSINSUSITIS AND INCIDENT LUNG CANCER STATUS, THE SINGAPORE CHINESE HEALTH STUDY
| Rhinosinusitis1 |
Lung cancer2 |
|||
|---|---|---|---|---|
| No (n = 59,683) | Yes (n = 1,638) | No (n = 60,367) | Yes (n = 954) | |
| Age (years) at recruitment | 56.5 (8.0) | 54.1 (7.4) | 56.3 (8.0) | 62.6 (7.2) |
| Body mass index (kg/m2) | 23.1 (3.3) | 22.8 (3.4) | 23.1 (3.3) | 22.3 (3.0) |
| Gender | ||||
| Males | 26,439 (44.3%) | 835 (51.0%) | 26,622 (44.1%) | 656 (68.8%) |
| Females | 33,244 (55.7%) | 803 (49.0%) | 33,745 (55.9%) | 298 (31.2%) |
| Dialect | ||||
| Cantonese | 27,394 (45.9%) | 952 (58.1%) | 27,950 (46.3%) | 374 (39.2%) |
| Hokkien | 32,289 (54.1%) | 686 (41.9%) | 32,417 (53.7%) | 580 (60.8%) |
| Level of education | ||||
| No formal education | 16,472 (27.6%) | 210 (12.8%) | 16,359 (27.1%) | 310 (32.5%) |
| Primary school (1–6 years) | 26,559 (44.5%) | 644 (39.3%) | 26,743 (44.3%) | 502 (52.6%) |
| Secondary and above | 16,652 (27.9%) | 784 (47.9%) | 17,265 (28.6%) | 142 (14.9%) |
| Cigarette smoking | ||||
| Never smokers | 41,420 (69.4%) | 1,168 (71.3%) | 42,317 (70.1%) | 265 (27.8%) |
| Former smoker | 6,446 (10.8%) | 247 (15.1%) | 6,520 (10.8%) | 138 (14.5%) |
| Current smokers | 11,817 (19.8%) | 223 (13.6%) | 11,530 (19.1%) | 551 (57.7%) |
| Age at starting to smoke3 | 20.2 (6.1) | 20.2 (6.2) | 20.3 (6.1) | 18.8 (5.8) |
| Cigarettes/day3 | 17.3 (11.4) | 17.7 (12.2) | 17.2 (11.4) | 19.1 (11.6) |
| Years of smoking3 | 33.1 (11.6) | 28.8 (12.9) | 32.7 (11.7) | 40.3 (8.3) |
| Allergic/atopic condition | ||||
| No | 52,939 (88.7%) | 1,181 (72.1%) | 53,244 (88.2%) | 850 (89.1%) |
| Asthma, hay fever, skin allergy, food allergy or any other allergy | 6,744 (11.3%) | 457 (27.9%) | 7,123 (11.8%) | 104 (10.9%) |
1
All differences between subjects with rhinosinusitis and those without were statistically significant at 2-sided p < 0.001 except for age at smoking (p = 0.963) and number of cigarettes per day (p = 0.417) among the ever smokers.
2
All differences between subjects with lung cancer and those without were statistically significant at 2-sided p < 0.001 except for association with allergic/atopic conditions (p = 0.408).
3
Among ever smokers only.