Mean (range) age in days at first and third immunisation and number of days from third immunisation to blood taking for preterm and term infants
| Preterm (n = 124) | Term (n = 54) | p Value* | |
|---|---|---|---|
| *Wilcoxon rank sum test. | |||
| Age at first immunisation | 66 (51–116) | 60 (41–84) | <0.001 |
| Age at third immunisation | 134 (108–194) | 123 (112–149) | <0.001 |
| Days from third immunisation to blood taking | 32 (23–51) | 33 (21–63) | 0.745 |