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This study compares the 30-item version of the General Health Questionnaire (GHQ) and the psychiatric section of the Cornell Medical Index Health Questionnaire (CMI-MR) using normative data from a sample of the general population and data from general practice patients where clinical assessment by a psychiatrist is used as a criterion of psychiatric caseness. In this study the CMI-MR has a slightly better overall performance as a screening test. It appears that the CMI-MR errs in the direction of false negatives when the symptoms are recent and related to situational stress, but the GHQ has a tendency to miss cases with symptoms of long standing.

As Greece moves during the last two decades toward a national health care system, which gives emphasis to the development of a primary care system, many worry how to ensure that the quality of care is assessed. This is more apparent in the rural populations, in which health care is served to a large extent by physicians without formal training in general practice. This article explores the level of knowledge of primary care physicians in relation to Alzheimer's disease in geographically defined areas of Crete, Greece, in comparison with that of general practitioners in Ostergötland, Sweden, and in Iceland. It emphasizes the need for better education and training for primary care physicians in Crete in both the early diagnosis and management of Alzheimer's disease.

typically underestimated by a factor of 2, to cast doubt on the significance of this feature (Tables I and II).In the structure determination at 110 K reported here, the esd's are lower by a factor of 3, and the corresponding Pt-C bond distances (2.172 (6), 2.154 (5), 2.176 (6), 2.178 (6) A) are much closer to being equivalent. Again assuming that X-ray standard deviations given by the refinement are underestimated by a factor of 2, the possibility that the bond distances are equivalent cannot be rejected on the basis of a X1 2 test at the 0.10 significance level.7 An ortep drawing8 of the molecule is shown in Figure 1.The important features to note in the structure of (COD)PtCl2 are as follows: (i) The COD molecule is symmetrically coordinated to the Pt atom, (ii) The ethylene portions of the COD molecule are twisted to avoid eclipsing, which lowers the point group symmetry of the molecule to C,. (iii) The coordinated C=C double bonds are lengthened (1.375 (8) and 1.387 (8) Á) by an amount comparable to that found in the isomorphous palladium complex9 and other similar systems.10 This is contrasted with a double-bond distance of 1.334 Á in the cyclooctatetraene molecule11 and 1.316 and 1.320 A bond distances for the uncoordinated double bonds in dichloro(cy-

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