Measuring the effectiveness of catch-up MMR delivered by school nurses compared to signposting to general practice on improving MMR coverage

Background This study assesses whether increased coverage of the measles, mumps and rubella (MMR) vaccination differs between areas where school nurses deliver catch-up MMR doses to adolescents in school settings, compared to signposting to general practice. Methods A retrospective cohort study was conducted using Child Health Information Services records within the NHS England South (South Central) commissioning boundary. The sample population included children born 1 September 2000–31 August 2001, in school year 9 during the 2014–15 academic year. Results The primary outcome findings show an increase in coverage of at least one dose of MMR by 1.6% (n = 334) in the cohort receiving catch-up MMR, compared to 0.2% (n = 12) in the cohort signposted to general practice. Over time, the difference in increase between the two cohorts was 1.4%, analysed using the chi-squared comparison of proportions test, providing strong evidence (P < 0.0001) that school nurse delivery of catch-up MMR is effective at increasing coverage. The findings also suggest that school nurse delivery of catch-up MMR may benefit Black, Asian and minority ethnic children and those from more deprived backgrounds. Conclusions It is recommended that commissioners of school-aged immunization services incorporate the delivery of catch-up MMR doses in their contracts with school nurses.