Table 2.
Age-adjusted data of median Ab titers (N = 365).
| Variable | Ab Titer at 6 Months, Median (IQR), U/mL | Correlation Coefficient ρ |
p-Value |
|---|---|---|---|
| Male/female | −15 (−246 to 241)/8 (−209 to 290) | 0.2851 * | |
| Body mass index, median (IQR), kg/m2 | 0.023 | 0.6647 # | |
| Smoking (ever/never) | −97 (−277 to 184)/56 (−182 to 342) | <0.0001 * | |
| Current smoker/ex-smoker | −205 (−320 to 7)/−72 (−264 to 256) | 0.0255 * | |
| ex-smoker vs. never-smoker | 0.0203 * | ||
| current smoker vs. never-smoker | <0.0001 * | ||
| Brinkman Index §§, §§§ | 0.012 | 0.8935 # | |
| Drinking | 3 (−242 to 296)/5 (−205 to 249) §, §§ | 0.6475 * | |
| Allergy | |||
| Food | 18 (−250 to 235)/−2 (−223 to 256) §, §§ | 0.9604 * | |
| Drug | −4 (−131 to 271)/−1 (−238 to 251) §, §§ | 0.5858 * | |
| Allergic disease | |||
| Allergic rhinitis including pollinosis | −7 (−240 to 271)/−1 (−223 to 253) §, §§ | 0.8473 * | |
| Bronchial asthma | 30 (−223 to 254)/−8 (−239 to 263) §, §§ | 0.7390 * | |
| Skin allergy including atopic dermatitis | 61 (−166 to 421)/−9 (−240 to 248) §, §§ | 0.1638 * | |
| Diabetes mellitus | −60 (−269 to 77)/0 (−225 to 272) §, §§ | 0.4696 * | |
| Hypertension | −69 (−247 to 183)/0 (−225 to 271) §, §§ | 0.6409 * | |
| Dyslipidemia | −56 (−220 to 259)/0 (−232 to 268) §, §§ | 0.7392 * | |
| Collagen disease | −227 (−368 to 290)/0 (−222 to 261) §, §§ | 0.3021 * |
IQR = interquartile range. *: Mann–Whitney U test. #: Spearman’s rank correlation coefficient test. §: yes/no are shown. §§: unknown is excluded. §§§: ever-smoker only.