| Age (yrs) | 35.54 ± 4.39 |
| Job | No. (%) |
| Household | 11 (15.7) |
| Employed | 59 (84.3) |
| Education level |
|
| Diploma | 10 (14.3) |
| College degrees | 60 (85.7) |
| The number of children |
|
| Only one child | 60 (85.7) |
| Two children | 10 (14.3) |
| Type of care |
|
| Home | 18 (25.7) |
| Kindergarten | 52 (74.3) |
| History of infection |
|
| Yes | 10 (14.3) |
| No | 60 (85.7) |