Table 1.
Basic characteristics of the participants of the Taizhou Imaging Study.
| Total | Males | Females | |
|---|---|---|---|
| N | 562 (100) | 259 (46.09) | 303 (53.91) |
| Age, years, mean ± SD | 59.25 ± 2.72 | 59.36 ± 2.74 | 59.15 ± 2.70 |
| 55–59, n (%) | 301 (53.56) | 133 (51.35) | 168 (55.45) |
| 60–65, n (%) | 261 (46.44) | 126 (48.65) | 135 (44.55) |
| Education, years, median (IQR) | 6 (0, 9) | 9 (6, 9) | 1 (0, 6)* |
| BMI, kg/m2, mean ± SD | 24.09 ± 3.30 | 23.56 ± 3.02 | 24.54 ± 3.46* |
| Smoking status, n (%) | |||
| Current smoker | 195 (35.33) | 191 (74.61) | 4 (1.35)* |
| Former smoker | 29 (5.25) | 28 (10.94) | 1 (0.34) |
| Non-smoker | 328 (59.42) | 37 (14.45) | 291 (98.31) |
| Alcohol drinking status, n (%) | |||
| Current drinker | 162 (29.35) | 153 (59.77) | 9 (3.04)* |
| Former drinker | 18 (3.26) | 17 (6.64) | 1 (0.34) |
| Non-drinker | 372 (67.39) | 86 (33.59) | 286 (96.62) |
| Hypertension, n (%) | 310 (55.16) | 133 (51.35) | 177 (58.42) |
| Diabetes, n (%) | 80 (14.23) | 33 (12.74) | 47 (15.51) |
| Hyperlipidemia, n (%) | 308 (54.80) | 127 (49.03) | 181 (59.74)* |
| MMSE, median (IQR)# | 27 (23, 29) | 29 (27, 30) | 24 (20, 27)* |
BMI, body mass index; MMSE, Mini-Mental Status Examination; IQR, interquartile range.
#Numbers of missing data were 19 for BMI, 10 for smoking status, 10 for alcohol drinking status, and 9 for MMSE.
*Differences between males and females were statistically significant (P < 0.05). The P-values were obtained using Student’s t test for continuous variables with normal or approximately normal distribution, using Kruskal-Wallis test for continuous variables with skewed distribution, and using chi-square test for categorical variables.