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Table 2 Insulin pulsatility analysis.

From: Delayed β-cell response and glucose intolerance in young women with Turner syndrome

  TS (N = 12)   Control (N = 13)   
  Mean ± SD Range Mean ± SD Range P-value
Deconvolution     
   Mass (pmol/L/pulse) 12.14 ± 3.93 7 - 17.5 15.49 ± 8.1 8 - 38.2 0.2
   Amplitude (pmol/L*min) 9.67 ± 3.15 5.5 - 13.9 12.35 ± 6.46 6.4 - 30.5 0.2
   Pulse interval (min/pulse) 7.92 ± 1.71 6.1 - 12.4 7.49 ± 0.95 6 - 9.5 0.3
   Basal secretion (pmol/L*min) 4.63 ± 2.25 4.48 - 2.09 4.48 ± 2.09 1.7 - 7.3 0.7
   Pulse fraction 0.28 ± 0.11   0.33 ± 0.11   0.1
Regularity Analysis     
   ApEn (m = 1, r = 0.2 × SD) 1.34 ± 0.15 0.974 - 1.503 1.39 ± 0.058 1.32 - 1.51 0.3
   ApEn (m = 1, r = 1.0 × SD) 0.586 ± 0.19 0.035 - 0.772 0.637 ± 0.073 0.5 - 0.762 0.4
   Spectral power 7.03 ± 2.85 3.3 - 11.9 7.58 ± 2.2 4.3 - 12.8 0.4
   Spectral frequency 10.58 ± 2.27 8 - 13 10.69 ± 2.39 7 - 13 0.6
   Autocorrelation coefficient 0.198 ± 0.144 0.005 - 0.462 0.246 ± 0.129 0.05 - 0.468 0.3
   Autocorrelation frequency 9.0 ± 2.8 6 - 15 9.62 ± 2.29 6 - 13 0.05
  1. Parameters of pulsatility analysis based on deconvolution analysis, spectral analysis, and autocorrelation analysis and on the estimation of approximate entropy (ApEn) of individual insulin concentration time series in TS and controls.