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J Am Med Inform Assoc 7:55-65 doi:10.1136/jamia.2000.0070055
  • Original Investigation

Assessing the Quality of Clinical Data in a Computer-based Record for Calculating the Pneumonia Severity Index

Table 4

Data Availability and Number of Missing Entries for Pneumonia Severity Index (PSI) Variables That Are Not Part of the Standard Data Set for 226 Patients

Characteristic Missing Values Data Availability
Oxygen saturation 23 0.898
Mental status 37 0.836
Blood urea nitrogen 14 0.938
Sodium 8 0.965
Glucose 14 0.938
Hematocrit 9 0.960
Arterial pH 84 0.628
Pleural effusion 195 0.137
Average
0.788

  • Note: Although the clinical parameters are needed for the evaluation of the PSI, the variables are not obtained for every pneumonia patient as part of clinical care in the emergency department.

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