D(M)FS increment (prevented fraction) ‐ nearest to 3 years (70 trials)
Study	Prevented fraction	95% c.i.
Abrams 1980	12%	(4% to 21%)
Andlaw 1975	21%	(12% to 30%)
Ashley 1977	21%	(9% to 33%)
Blinkhorn 1983	26%	(13% to 40%)
Brudevold 1966	21%	(12% to 30%)
Buhe 1984	22%	(16% to 27%)
Cahen 1982	13%	(6% to 20%)
Di Maggio 1980	61%	(55% to 68%)
Dolles 1980	17%	(‐48% to 81%)
Fanning 1968	21%	(15% to 27%)
Fogels 1979	18%	(11% to 25%)
Forsman 1974	10%	(‐9% to 29%)
Forsman 1974a	8%	(‐9% to 25%)
Gish 1966	26%	(13% to 40%)
Glass 1978	28%	(11% to 44%)
Glass 1983	26%	(12% to 39%)
Hanachowicz 1984	27%	(19% to 34%)
Hargreaves 1973	25%	(11% to 39%)
Hargreaves 1973a	28%	(15% to 42%)
Hargreaves 1973b	23%	(12% to 34%)
Held 1968	80%	(71% to 90%)
Held 1968a	31%	(‐5% to 68%)
Held 1968b	‐9%	(‐74% to 56%)
Hodge 1980	18%	(8% to 27%)
Horowitz 1966	17%	(7% to 27%)
Howat 1978	26%	(14% to 37%)
Jackson 1967	12%	(4% to 20%)
James 1967	18%	(5% to 31%)
James 1977	31%	(24% to 37%)
Kinkel 1972	37%	(26% to 49%)
Kleber 1996	‐4%	(‐54% to 46%)
Koch 1967	40%	(27% to 54%)
Koch 1967a	48%	(39% to 58%)
Koch 1967b	38%	(19% to 58%)
Koch 1967c	11%	(‐6% to 28%)
Lind 1974	32%	(23% to 40%)
Mainwaring 1978	16%	(7% to 25%)
Mainwaring 1983	19%	(10% to 29%)
Marthaler 1965	31%	(20% to 42%)
Marthaler 1965a	26%	(5% to 47%)
Marthaler 1970	22%	(‐1% to 44%)
Marthaler 1970a	35%	(6% to 64%)
Marthaler 1974	33%	(11% to 55%)
Mergele 1968	13%	(1% to 26%)
Muhler 1955	36%	(19% to 53%)
Muhler 1970	29%	(14% to 44%)
Murray 1980	30%	(21% to 39%)
Naylor 1967	14%	(7% to 21%)
Naylor 1979	22%	(14% to 31%)
Peterson 1967	17%	(9% to 25%)
Peterson 1979	10%	(‐7% to 27%)
Reed 1973	12%	(1% to 23%)
Reed 1975	30%	(15% to 45%)
Ringelberg 1979	18%	(1% to 35%)
Rule 1984	29%	(20% to 37%)
Segal 1967	19%	(5% to 34%)
Slack 1967	1%	(‐14% to 15%)
Slack 1967a	5%	(‐7% to 17%)
Slack 1971	17%	(9% to 24%)
Thomas 1966	30%	(17% to 44%)
Torell 1965	20%	(11% to 29%)
Torell 1965a	6%	(‐5% to 18%)
Torell 1965b	15%	(5% to 26%)
Weisenstein 1972	11%	(‐3% to 25%)
Zacherl 1970	40%	(32% to 49%)
Zacherl 1970a	43%	(37% to 50%)
Zacherl 1972	22%	(11% to 34%)
Zacherl 1972a	23%	(12% to 35%)
Zacherl 1973	30%	(10% to 49%)
Zacherl 1981	32%	(20% to 44%