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OCR for page 132
Appendix L STANDARD ERRORS ANI) CONFIDENCE: INTERVALS FOR STATI STI CS BASIN) ON ~ ~ DATA FROlI PRIVATE- ABSTRACTING - SERVICES ~ - - Polnt Standard Confidence Statistic - - ~ ~ ~ estimate ~ - error ~ ~ interval Percent of abstracts 65 .20 1 . 14 63 . 32-67 .08 with no discrepancy f or princ Opal diag- nos is coded to four- dig its Percent of abstracts 73.20 1.53 70.68-75.72 with no dis crepancy for princ ipal pro- cedu re 132

OCR for page 132
Agnes is ~ ~ 1 _ _ 133 Append ix L STANDARD ERRORS AND CONFIDENCE INTERVALS FOR NET DIFFERENCE RATES ~ TIMES 100) ~ BASED ~ ON ~ DATA- FROM- PRIVATE ABSTRACTING ~ SERVICES ~ ~ _ ~ Point Standard estimate - - error . . . . . Confidence interval ~ Cerebrovascular 1.07 0.27 0.62-1.52 diseases Chronic ischemic -2.24 0.48 -3.03--1.65 heart disease Acute myocardial 0.86 0.08 0.78-0.94 infarction Diabetes mellitus 0.09 0.33 -0.06-0.24 Carcinoma of the breast -0.10 0.04 -0.17-0.03 End stage renal disease 0.04 0.02 0.01-0.07 Cholelithiasis/ 0.31 0.13 0.10-0.52 cholecyst it is Hernia without -0.02 0.04 -0.09-0.05 obstruction Delivery 0.23 0.05 0.15-0.31 Hypertrophy of tonsils and adenoids -0.01 0.02 -0.04-0.02 Fracture of neck of 0.34 0.12 0.14-0.54 femur Displacement of inter- 0.10 0.06 0.00-0.20 vertebral disc Cataract 0.18 0.10 0.01-0.35 Neuroses 0.09 0.13 -0.12-0.30 d