Then the output voltage of the VCAII amplifier (IC2A) refers to the amplification factor set by the [U.sub.GS] voltage of the T2 transistor and this amplification factor indirectly corresponds to the amplification factor of the signal VCAI
. The output of the auxiliary amplifier serves as a feedback for the DC input amplifier made with the operational amplifier IC2B.
For VCAI, the pool for comparison cases was restricted to claims with documentation of vascular catheter insertion (ICD-9-CM codes 38.93 or 38.95).
For example, length of an ICU stay is possibly the strongest predictor of acquiring VCAI, but while number of days prior to infection is a predictor, number of days post infection is an outcome.
The differences between HACs and comparison cases in the proportion with at least one all-cause readmission during the episode range from 5 percentage points (CAUTI and VCAI) to 16 percentage points (SSI/ortho).
For pressure ulcers, VCAI, SSI/ortho, and DVT/ PE, the matched sample differences overstate the incremental effect of the HAC, while for fractures and CAUTI, the matched sample differences significantly understate the effect.