Exposure stratum | Person-months* in children at risk of acquisition | Number of acquisitions | Rate of acquisition per month per 100 children (90% confidence interval) |
---|---|---|---|
None | 7732 | 35 | 0.45 (0.34 – 0.60) |
DCC only | 1074 | 27 | 2.51 (1.83 – 3.45) |
Family and | 64 | 8 | 12.50 (7.00–22.32) |
DCC | |||
Family only | 22 | 1 | 4.55 (0.88–23.43) |
Total | 8892 | 71 | 0.80 (0.66 – 0.97) |