Skip to main content

Table 4 MTI instrument output derived when exposed to "golden standard" accelerations 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

November 2003 N Measured acceleration (Counts*min-1) SD CV (%)
Setting #1 (1.52 m*s-2) 25 3023 (2991–3054) 76 (59–106) 2.5
Setting #2 (2.08 m*s-2) 25 5015 (4960–5071) 134 (105–187) 2.7
Setting #3 (1.11 m*s-2) 25 2986 (2958–3013) 67 (53–94) 2.2
Setting #4 (3.38 m*s-2) 25 7967 (7876–8058) 219 (171–305) 2.7
January 2004     
Setting #1 (1.52 m*s-2) 25 3083 (3029–3137) 132 (103–183) 4.2
Setting #2 (2.08 m*s-2) 25 5133 (5046–5219) 210 (164–292) 4.1
Setting #3 (1.11 m*s-2) 25 3070 (3012–3128) 141 (110–196) 4.6
Setting #4 (3.38 m*s-2) 25 8175 (8035–8315) 339 (265–472) 4.1
March 2004     
Setting #1 (1.52 m*s-2) 23 3100 (3034–3167) 153 (119–217) 5.0
Setting #2 (2.08 m*s-2) 23 5142 (5042–5241) 230 (178–325) 4.5
Setting #3 (1.11 m*s-2) 23 3048 (2988–3108) 139 (108–197) 4.6
Setting #4 (3.38 m*s-2) 23 8160 (8013–8308) 341 (264–483) 4.2
  1. (N equals numbers of instruments)