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Graphics Interchange Format  |  1999-06-07  |  107.7 KB  |  400x688  |  8-bit (240 colors)
   ocr: TABLE 20.1-5. Number of Patients Needed in an Experimental Group for 80% Power to Detect (One-Sided C = 0.05) a Specified Dilference in Success Rates Proportion Number of Historical Controls of Success for Historical Controls 20 30 40 50 75 100 200 0.10 * 2231 108 80 58 50 42 116 531 40 35 29 27 24 39 278 23 21 18 18 16 22 17* 15 14 13 13 12 0.20 * * 285 167 101 83 65 385 98 67 55 44 40 35 67 40 33 30 26 24 22 31 23 21 19 18 17 16 0.30 a * 554 259 137 108 80 882 137 87 69 54 48 42 86 49 39 35 30 29 26 31 27 24 22 20 19 18 0.40 * * 699 303 153 120 88 913 147 92 74 58 52 44 85 50 41 36 32 30 27 ...