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Table 2 Raw and calibrated instrument output derived through repeated measurements in setting #2 in the mechanical setup. Data are Means and standard deviations with 95% CI, and coefficients of variation

From: Unit-specific calibration of Actigraph accelerometers in a mechanical setup – Is it worth the effort? The effect on random output variation caused by technical inter-instrument variability in the laboratory and in the field

  N Measured acceleration (counts*min-1) SD CV (%)
Raw MTI output 340 5160 (5137–5184) 221 (206–239) 4.3
Calibrated MTI 340 5155 (5142–5169) 127 (118–138) 2.5
Raw CSA output 407 5025 (4990–5061) 361 (338–388) 7.2
Calibrated CSA output 407 4927 (4913–4940) 137 (128–147) 2.8
  1. (N equals the total number of repeated quality checks in setting #2)