Demographic data
| Day care | Siblings | Daycare and siblings | Nasal carriage of pneumococcus in parents | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Group | Season | Mean age (months) | Number (%) attending | Mean hours of attenders per week | Number (%) with 1 or more siblings | Number (%) with a sib, or daycare or both | Number (%) exposed to cigarette smoke | Number (%) using antibiotics in previous 4 weeks | Father, number (%) positive | Mother, number (%) positive |
| Daycare included any setting outside the family home where the child spent time on a regular basis and came in contact with two or more unrelated children. For the purpose of this study, a child was considered to be attending daycare if they spent at least four hours per week outside the family home in such settings. | ||||||||||
| Control (n=126) | Summer | 36.4 | 105 (83) | 13.3 | 91 (72) | 122 (97) | 40 (32) | 11 (8.7) | 1/23 (4.3) | 5/115 (4.3) |
| Vaccinated (n=150) | Summer | 33 | 73 (49) | 13.2 | 100 (67) | 126 (84) | 43 (29) | 8 (5.3) | 2/36 (5.6) | 3/138 (2.2) |
| Control (n=188) | Winter | 39.9 | 152 (81) | 14.7 | 139 (74) | 181 (96) | 59 (31) | 16 (8.5) | 1/32 (3.1) | 4/171 (2.3) |
| Vaccinated (n=143) | Winter | 40.3 | 121 (85) | 16.6 | 101 (71) | 139 (97) | 36 (25) | 14 (9.8) | 1/26 (3.8) | 4/122 (3.3) |