Table 1:
Characteristics of subjects consenting to blood sampling (Seropositives are all ELISA IgG positive subjects)
| Variable | Category (yr) | Total No. (% Seropositive) | Correlation Coefficient | P-value |
|---|---|---|---|---|
| Age | 0–19 | 5 (0) | − 0.21 | 0.017a |
| 20–29 | 18 (16.7) | |||
| 30–39 | 37 (19) | |||
| 40–49 | 28 (14.3) | |||
| ≤50 | 20 (10) | |||
| Education | 0–5 | 62 (22.5) | − 0.19 | 0.04 a |
| 6–8 | 16 (12.5) | |||
| 9–12 | 19 (10) | |||
| 12≥ | 11 (0) | |||
| Work history | 0–5 | 15 (26.7) | − 0.1 | 0.201a |
| 6–10 | 19 (15.7) | |||
| 11–15 | 31 (12.9) | |||
| 16–20 | 21 (14.3) | |||
| 21≥ | 22 (9) | |||
| Province | North Khorasan | 16 (0) | - | 0.195b |
| Razavi Khorasan | 80 (17.5) | |||
| South khorasan | 12 (16.7) |
a:
Kendall- tau correlation test
b:
Chi-Square test