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Mean differences OLOS-PLOS1 according to efficiency of care
| Efficiency assessment | Mean | N | Std. Deviation | 95% Confidence interval |
| Adequate | -4.1663 | 143 | 8.0234 | -5.49 to -2.84 |
| Impaired Efficiency | 2.0541 | 44 | 10.0399 | -1.00 to 5.11 |
| Total | -2.7027 | 187 | 8.9134 |
1 Obtained with the second group of 187 histories.
