Table 4.
Confounding variables.
| Patient characteristics | 2019 | 2020 | p-Value | Test | ||
|---|---|---|---|---|---|---|
| Age | Mean 44.49911 | Mean 35.31041 | Mean difference 9.1887 | 95% CI 7.9617-10.4157 | .0 | t statistic = 14.682 degrees of freedom = 3994 |
| Mechanical ventilator days, average use, | Mean 4.637427 | Mean 6.024773 | Mean difference 1.3874 | 95% CI 0.9298-1.845 | .0 | t statistic = −5.9463 degrees of freedom= 1711.5 |
| Central line days, average use, | Mean 8.150607 | Mean 8.301244 | Mean difference 0.1506 | 95% CI 0.3438-0.6451 | .5503 | t statistic = −0.59733 degrees of freedom= 2928.4 |
| Urinary catheter days, average use, | Mean 5.162639 | Mean 5.624106 | Mean difference 0.4614 | 95% CI 0.1485-0.7745 | .0039 | t statistic = −2.8908 degrees of freedom = 2877.2 |
| Peripheral catheter days, average use, | Mean 5.713647 | Mean 5.79456 | Mean difference 0.0809 | 95% CI 0.3232-0.485 | .6947 | t statistic = −0.39259 degrees of freedom = 2711.4 |
| Hospitalization type | ||||||
| Medical | 51.8% | 51.8% | ||||
| Surgical | 48.2% | 48.2% | .9806 | χ2 = 0.00058997 degrees of freedom = 1 | ||
| Gender | ||||||
| Female | 37.7% | 38.02% | ||||
| Male | 62.3% | 61.98% | .8469 | χ2 = 0.037295 degrees of freedom = 1 |
CI = confidence interval.