Table 1.
The number of samples with detected MPs and the distribution of the number of MP particles by µ-FTIR, according to the characteristics.
| N (%) | Detected samples | Number of total MPs (N/ml) | |||
|---|---|---|---|---|---|
| N (%) | P † | Mean | P * | ||
| Total | 36 (100.0) | 32 (88.9) | 4.3 | ||
| Gender | |||||
| Male | 10 (27.8) | 9 (90.0) | 0.895 | 2.4 | 0.128 |
| Female | 26 (72.2) | 23 (88.5) | 5.0 | ||
| Age | |||||
| < 40 | 17 (47.2) | 16 (94.1) | 0.345 | 6.2 | 0.078 |
| ≥ 40 | 19 (52.8) | 16 (84.2) | 2.5 | ||
| Education | |||||
| College or below | 22 (61.1) | 19 (86.4) | 0.546 | 5.7 | 0.045 |
| Above college | 14 (38.9) | 13 (92.9) | 2.0 | ||
| Job | |||||
| White collar | 32 (88.9) | 28 (87.5) | 0.755 | 4.4 | 0.944 |
| Blue collar | 2 (5.6) | 2 (100) | 2.5 | ||
| No | 2 (5.6) | 2 (100) | 3.0 | ||
| Marital status | |||||
| Single | 10 (27.8) | 9 (90.0) | 0.895 | 5.2 | 0.999 |
| Married | 26 (72.2) | 23 (88.5) | 3.9 | ||
| Smoking | |||||
| Never | 33 (91.7) | 30 (90.9) | 0.201 | 4.5 | 0.284 |
| Former | 3 (8.3) | 2 (66.7) | 1.7 | ||
| Alcohol | |||||
| No | 9 (25.0) | 9 (100) | 0.221 | 6.6 | 0.202 |
| Yes | 27 (75.0) | 23 (85.2) | 3.5 | ||
| Physical inactivity | |||||
| No | 12 (33.3) | 10 (83.3) | 0.453 | 4.6 | 0.635 |
| Yes | 24 (66.7) | 22 (91.7) | 4.1 | ||
*Wilcoxon rank-sum test (or Kruskal–Wallis rank-sum test) was performed to test the differences in the number of MPs in the blood samples by group. Chi-square tests were performed to test for differences in MP detection.