A study is reported of some two thousand consecutive visits to the emergency service of the Yale-New Haven Hospital during a two-week period. The salient characteristics of those using the emergency service were defined. Patterns of medical care were analyzed in relation to urgency of need for emergency treatment and other indexes and factors. Findings modified hypotheses concerning those who use emergency service and their reasons for doing so.

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How do patients in group practice prepayment plans see the medical care they receive and the practitioners who provide it? What factors determine their perceptions? How are the plans used by their members? Studies bearing on these questions are reviewed and significant inferences are drawn for action and further investigation.

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