Case-control study: characteristics of anti-PF4/heparin Ab negative and positive individuals (matched pairs)
| . | Anti-PF4/heparin Ab status . | P* . | |
|---|---|---|---|
| Negative . | Positive . | ||
| No. of subjects | 40 | 40 | |
| Socioeconomic and behavioral variables | |||
| Male sex | 20 (50.0%) | 20 (50.0%) | |
| Age, y | 49 (43; 52) | 48 (44; 51) | .26 |
| School education | |||
| < 10 y | 2 (5.0%) | 2 (5.0%) | |
| 10 y | 32 (80.0%) | 32 (80.0%) | |
| > 10 y | 6 (15.0%) | 6 (15.0%) | |
| Smoking status | |||
| Never smoker | 14 (35.0%) | 14 (35.0%) | |
| Former smoker | 10 (25.0%) | 10 (25.0%) | |
| Current smoker | 16 (40.0%) | 16 (40.0%) | |
| Periodontal variables | |||
| Mean probing depth, mm | 2.29 (1.92; 2.61) | 2.71 (2.35; 2.99) | .01 |
| Extent of probing depth ≥ 3 mm, % | 30.0 (15.4; 58.0) | 48.9 (32.9; 62.1) | .03 |
| Number of present teeth | 25 (22; 26) | 23 (21; 26) | .20 |
| . | Anti-PF4/heparin Ab status . | P* . | |
|---|---|---|---|
| Negative . | Positive . | ||
| No. of subjects | 40 | 40 | |
| Socioeconomic and behavioral variables | |||
| Male sex | 20 (50.0%) | 20 (50.0%) | |
| Age, y | 49 (43; 52) | 48 (44; 51) | .26 |
| School education | |||
| < 10 y | 2 (5.0%) | 2 (5.0%) | |
| 10 y | 32 (80.0%) | 32 (80.0%) | |
| > 10 y | 6 (15.0%) | 6 (15.0%) | |
| Smoking status | |||
| Never smoker | 14 (35.0%) | 14 (35.0%) | |
| Former smoker | 10 (25.0%) | 10 (25.0%) | |
| Current smoker | 16 (40.0%) | 16 (40.0%) | |
| Periodontal variables | |||
| Mean probing depth, mm | 2.29 (1.92; 2.61) | 2.71 (2.35; 2.99) | .01 |
| Extent of probing depth ≥ 3 mm, % | 30.0 (15.4; 58.0) | 48.9 (32.9; 62.1) | .03 |
| Number of present teeth | 25 (22; 26) | 23 (21; 26) | .20 |
Categorical data are presented as numbers (percentages), and continuous data are given as median (25th; 75th percentiles).
Paired-sample Wilcoxon signed rank test.