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Comparing Descriptive Statistics for Retrospective Studies From One-per-Minute and One-per-Second Data.

Hylke H Salverda1, Janneke Dekker1, Ruben S G M Witlox1

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One-per-minute neonatal intensive care unit data are sufficient for retrospective research. This lower-frequency data provides comparable descriptive statistics to higher-frequency data, enabling retrospective analyses and algorithm development.

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Area of Science:

  • Neonatal intensive care unit (NICU) research
  • Biomedical data analysis
  • Retrospective study design

Background:

  • NICUs generate substantial data potentially valuable for research.
  • The adequacy of lower-frequency data (e.g., one-per-minute) for retrospective studies is uncertain.
  • Investigating the utility of one-per-minute data for descriptive statistics is crucial.

Purpose of the Study:

  • To assess the comparability of one-per-minute data with one-per-second data for descriptive statistics in NICU research.
  • To determine if one-per-minute data is sufficient for retrospective analyses.
  • To evaluate the potential use of routinely collected one-per-minute data for developing algorithms and identifying associations.

Main Methods:

  • One-per-second inspiratory oxygen and saturation data were aggregated to one-per-minute intervals.
  • Key statistical measures including average, standard deviation, target range time, hypoxia incidence, supplemental oxygen duration, and signal integrity were compared.
  • Sub-analyses were performed on data recordings of shorter durations (under 100 and 200 hours).

Main Results:

  • Descriptive statistics derived from one-per-minute data showed minimal to no difference when compared to one-per-second data.
  • Sub-analyses of shorter data recordings (under 100 and 200 hours) yielded consistent results, indicating no significant discrepancies.
  • The number of data recordings analyzed was equal for both frequencies (n=92).

Conclusions:

  • One-per-minute NICU data is comparable to one-per-second data for descriptive statistical analysis.
  • Routinely collected one-per-minute data can be reliably used for retrospective research, including algorithm development and association studies.
  • The findings support the use of lower-frequency data for retrospective NICU research, potentially simplifying data management and analysis.