| Study | Reason for exclusion |
|---|---|
| Artenstein 1967 | No control group |
| Band 1984 | Trial of post‐exposure prophylaxis for H. influenzae and not N. meningitidis |
| Beam 1971 | No randomisation |
| Beaty 1983 | Includes previously published data (Guttler 1971) included in this review. New data from a non‐randomised study also excluded |
| Cardenas 1995 | No control group |
| Chapalain 1992 | No randomisation |
| Cheever 1943 | No randomisation |
| Devine 1972 | No randomisation |
| Devine 1973 | No randomisation |
| Fairbrother 1940 | Not a controlled trial |
| Gaunt 1988 | Not a RCT. The type of publication was a letter to the editor and did not contain any relevant data |
| Gilja 1993 | Not a controlled trial |
| Gonzalez 2000 | No randomisation |
| Gray 1941 | No randomisation |
| Halstensen 1995 | No control group |
| Kuhns 1943 | No randomisation |
| Potter 1990 | Patients with homozygous deficiency of the sixth component of complement (C6) with recurrent meningococcal meningitis |
| Sanders 1967 | No control group |
| Sheehab 1991 | No control group |
| Sivonen 1978 | No randomisation |
| Wall 1982 | Not a RCT. The type of publication was a letter to the editor and did not contain any relevant data |
| Weidmer 1971 | No randomisation |
RCT: randomised controlled trial