Fig. 1: Histogram of the collected actigraphy samples.
From: Validation of sleep-based actigraphy machine learning models for prediction of preterm birth
Results are stratified by whether the patient experienced a positive or negative preterm birth outcome. In the first trimester there are 263 negative patients and 39 positive patients who had a sample, 262 negative patients and 47 positive patients who have a sample, and in the third trimester there are 46 positive patients and 8 negative patients who have a sample.
