Table 2.
Prevalence of the head lice infestation in primary school pupils by social factors in Khajeh, Iran
| Characteristics | No. of Examination | No. of infestations | Prevalence (%) |
|---|---|---|---|
| Frequency of hair washing | |||
| Once two week | 150 | 13 | 8.66 |
| Once a week | 297 | 11 | 3.7 |
| twice or more a week | 36 | 0 | 0 |
| Family size | |||
| ≤3 | 20 | 0 | 0 |
| >3 | 480 | 24 | 5 |
| Type of House | |||
| Muddy | 99 | 10 | 10.1 |
| Woody | 244 | 14 | 5.73 |
| Brick built | 157 | 0 | 0 |
| School grade | |||
| I | 96 | 13 | 13.54 |
| II | 113 | 5 | 4.42 |
| III | 105 | 3 | 2.85 |
| IV | 87 | 2 | 2.29 |
| V | 99 | 1 | 1.01 |
| Number use of comb in day | |||
| Not use | 88 | 6 | 6.81 |
| Once a day | 202 | 12 | 5.94 |
| Twice a day | 210 | 6 | 2.85 |