Characterizations of Temporal Postoperative Pain Signatures With Symbolic Aggregate Approximations.

ABSTRACT:

Objectives

The primary aim was to characterize the temporal dynamics of postoperative pain intensity using symbolic aggregate approximation (SAX). The secondary aim was to explore the effects of sociodemographic and clinical factors on the SAX representations of postoperative pain intensity.

Materials and methods

We applied SAX to a large-scale time series database of 226,808 acute postoperative pain intensity ratings. Pain scores were stratified by patient age, sex, type of surgery, home opioid use, and postoperative day (POD), and costratified by age and sex. Cosine similarity, a metric that measures distance using vector angle, was applied to these motif data to compare pain behavior similarities across strata.

Results

Across age groups, SAX clusters revealed a shi

SUBMITTER: Tighe PJ 

PROVIDER: S-EPMC5097898 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature