| Study characteristics |
| Methods |
Retrospective cohort study ‐ Bengal, India |
| Participants |
Children aged 9 to 59 months (as on 30 June 2011) |
| Interventions |
Vaccine type undeclared ‐ measles vaccination status was determined from immunisation cards. If immunisation card was not available, vaccination status was recorded as unknown. |
| Outcomes |
WHO definitions of clinical and confirmed measles. A clinical case of measles is defined as fever with maculopapular rash and either conjunctivitis or cough or coryza. A confirmed case of measles is defined as a clinical case who is positive for anti‐measles virus nucleoprotein immunoglobulin M antibodies in serological tests but has not been vaccinated against measles during last 1 month. 6 blood samples were collected from selected cases, who were within 5th to 15th day of illness from the onset of rash, for IgM enzyme‐linked immunosorbent assay test. |
| Funding Source |
Government |
| Notes |
Vaccine type undeclared, probably 1 dose was administered. |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| PCS/RCS ‐ exposed cohort selection |
High risk |
There was insufficient information. |
| PCS/RCS ‐ non‐exposed cohort selection |
High risk |
There was insufficient information. |
| PCS/RCS ‐ comparability |
High risk |
There was insufficient information. |
| PCS/RCS ‐ assessment of outcome |
Low risk |
Clinically confirmed |
| Summary Risk of Bias assessment |
High risk |
We had concerns regarding multiple domains such that our confidence in the result is substantially lowered. |
