GP triage was associated with a 33 % increase in the mean number of contacts per person over 28 days compared with usual care ( 265 [ SD 174 ] vs 191 [ 143 ] ; rate ratio [ RR ] 133 , 95 % CI 130-136 ) , and nurse triage with a 48 % increase ( 281 [ SD 168 ] ; RR 148 , 95 % CI 144-152 ) .