Table 6 STS Model Variables and NNE Registry Data
From: Elevated preoperative Galectin-3 is associated with acute kidney injury after cardiac surgery
STS | NNE |
|---|---|
 1. We were unable to adjust for chronic lung disease or prior myocardial infarction in the same way as the investigators did in the STS preoperative readmission model. | |
STS registry had data on the severity of chronic lung disease (none, mild, moderate, severe) | NNE registry only contains information on whether or not members of our patient cohort had chronic obstructive pulmonary disease (COPD) or not. |
2. The STS and NNE registries also categorize prior myocardial infarctions in different ways. | |
STS uses four different categories (no recent MI, MI between one and 21Â days ago, MI more than six and less than 24Â h ago, and MI less than or equal to 6 h ago) | NNE registry instead uses five categories for our cohort (no prior MI, MI less than 24Â h prior to operation, MI more than 24Â h but less than 7 days prior to operation, MI more than 7 days but less than 1 year prior to operation, and MI more than 0 year prior to operation) |
3. We were unable to adjust for immunosuppressive treatment at all, since the NNE registry did not collect that information for our cohort. | |
4. Our final NNE version of the STS preoperative readmission risk adjustment model included 30 covariates. | |