structure(list(study = structure(c(1L, 1L, 2L, 2L, 2L, 3L, 3L, 
4L, 4L, 5L, 5L, 6L, 6L, 7L, 7L, 8L, 8L, 9L, 9L, 10L, 10L), .Label = c("DART", 
"London Corn/Olive", "London Low Fat", "Minnesota Coronary", 
"MRC Soya", "Oslo Diet-Heart", "STARS", "Sydney Diet-Heart", 
"Veterans Administration", "Veterans Diet & Skin CA"), class = "factor"), 
    treatment = structure(c(1L, 2L, 1L, 2L, 2L, 1L, 2L, 1L, 2L, 
    1L, 2L, 1L, 2L, 1L, 2L, 1L, 2L, 1L, 2L, 1L, 2L), .Label = c("control", 
    "diet"), class = "factor"), responders = c(113L, 111L, 1L, 
    5L, 3L, 24L, 20L, 248L, 269L, 31L, 28L, 65L, 48L, 3L, 1L, 
    28L, 39L, 177L, 174L, 2L, 1L), exposure = c(1917, 1925, 43.6, 
    41.3, 38, 393.5, 373.9, 4715, 4823, 715, 751, 885, 895, 87.8, 
    91, 1011, 939, 1544, 1588, 125, 123)), .Names = c("study", 
"treatment", "responders", "exposure"), row.names = c(NA, -21L
), class = "data.frame")
