Table 4 Methods of analysis
Lead Author | Date | Primary outcome measure | Method(s) of Analysis |
|---|---|---|---|
Gambia Hepatitis Study Group [4] | 1987 | Liver cancer rates/Vaccine efficacy | Comparisons of incidence rates on a step by step basis to identify vaccine efficacy |
Cook [17] | 1996 | Health Behaviour Questionnaire measures | Comparison of group means and group by time, gender and education interactions (F-test) |
Wilmink [19] | 1999 | Incidence and mortality of RAAAs | Poisson likelihood distribution for incidence rates in person years and maximum likelihood rate ratios |
Somerville [14] | 2002 | Respiratory Health Symptoms | Not stated (description of intervention only) |
Fairley [15] | 2003 | Proportion of missed doses | Unpaired t-test of means |
Hughes [12] | 2003 | Mother to child HIV transmission | Not stated (protocol only) |
Levy [16] | 2004 | Proportion of missed doses | Wilcoxon rank-sum test |
Priestly [22] | 2004 | Rate of in-hospital deaths | Logistic regression Cox proportional hazard models (length of stay) |
Bailey [18] | 2004 | Water quality | Summary statistics only Time series analysis for diarrhoea rates |
Grant [20] | 2005 | TB episodes >90 days after clinic entry | Poisson random effects model |
Ciliberto [21] | 2005 | Attainment WHZ score >-2/Death | 95% CI for differences between groups Linear and logistic regression for effects of covariates |
Chaisson [13] | 2005 | TB Incidence | Step by step analysis of incidence Conditional logistic regression Cost-effectiveness analysis |