I et andet studie (n=310) hvor der benyttedes en vægtjustered dosis (100 mikrogram/ kg) var gennemsnitlig varighed af grad 4 neutropeni 1, 7 dage for pegfilgrastim gruppen, sammenlignet med 1, 8 dage for filgrastim gruppen (forskel på 0, 03 dage, 95% CI - 0, 36; 0, 30).
In a second study (n=310), which used a weight-adjusted dose (100 micrograms/ kg), the mean duration of grade 4 neutropenia for the pegfilgrastim group was 1.7 days, compared with 1.8 days in the filgrastim group (difference 0.03 days, 95% CI -0.36, 0.30).