Skip to main content

Table 2 Reliability of accelerometer-based methods, sorted by methodological study quality, study result rating and quality of evidence

From: Systematic review of accelerometer-based methods for 24-h physical behavior assessment in young children (0–5 years old)

Study Study populationa Outcome(s) & Setting Time interval Methodological study qualityb Placement Device-based methodc Results Study result ratingd Quality of evidencee
Hager et al. (2016) [42] Toddlers
n = 24 * 2 Ac
Age = 24.5 ± 5.2 (14.7 to 35.5) months
Sex = 41.7% girls
Activity counts
Laboratory (structured activities)
n.a A Non-dominant ankle; side-by-side Ac-cts-omni-60 ICC? = .98 +  Low
Aadland & Johannessen (2015) [65] Preschoolers
n = 91
Age = 4.07 ± 0.5 (3 to 5) years
Sex = 51% girls
Total PA, SB, LPA and MVPA in min/day and % of valid wear time
Free-living
14 days A Not reported AG-Ev-VA-10 ICC(1,1) ≥ .75 for all outcomes across all wear criteria (≥ 6, 8 and 10 h/day and ≥ 3 and 5 days/week)
Except for SB (min/day): ICC(1,1) .61 to .81
Higher ICC(1,1) for percentages than absolute values
ICC(1,1) ≥ .80 (≥ 6 and ≥ 8 h/day) > 7 days required
ICC(1,1) ≥ .80 (≥ 10 h/day) within 7 days: 3.9 to 7.1 days
+ 
(SB + ;
PA +)
Low
Greenspan, Cunha, & Lobo (2021) [29] Infants
n = 16
Age = 3.1 ± 1.1 (1.8 to 5) months
Sex = 51% girls
Body position: supine, reclined, upright, inclined, and prone
Free-living (structured play)
0 days I Trunk GG-Gr-HA/VA/DA-1 κw = .89, 95% CI (.87 to .91)
Supine: agreement = 89.2%
Reclined: agreement = 72.6%
Upright: agreement = 90.9%
Inclined: agreement = 84.6%
Prone: agreement = 91.1%
+  Very low
  1. Abbreviations: Ac Actical, AG ActiGraph, cpm counts per minute, cts counts, DA diagonal axis (z-axis), Ev Evenson’s cut-points (2008) [91], GG get around garment with ADXL335, Gr Greenspan’s cut-points (2021) [29], HA horizontal axis (x-axis), ICC? intraclass correlation coefficient analysis decision was unclear, ICC(1,1) intraclass correlation coefficient inappropriate analysis decision one-way random effects model, κwweighted Kappa, LPA light physical activity, MVPA moderate-to-vigorous physical activity, n.a. not applicable, omni omnidirectional, PA physical activity, r unknown correlation coefficient, SB sedentary behavior, VA vertical axis (y-axis), 1 1 s epoch, 10 10 s epoch, 60 60 s epoch
  2. aAge presented as mean ± SD (range)
  3. bMethodological study quality based on newly developed checklist: VG very good, A adequate, D doubtful, I inadequate
  4. cDevice-based method described using code combinations of four elements resulting in the following format: brand-axis-approach-epoch length
  5. dStudy result rating based on COSMIN guideline: + sufficient, ± inconsistent, - insufficient, ? intermediate
  6. eQuality of evidence based on GRADE approach