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Table 3 Details of measurement of physical activity

From: Single parent status and children’s objectively measured level of physical activity

Studies Accelerometer model Level of measurement used for calculation of effect size Number of days (and hours) with PA assessment Threshold, (counts.min−1 or counts.hour−1) Cut-point used to define outcome Percentage with valid measurements (%)
Lower Upper
Bagley et.al. [27] Manufacturing Technology Inc., Actigraph Model, AM7164-2.2C, USA MVPA 8 days, day 2–6 included. At least four weekdays and one weekend day. At least 10 h per day <10,000 >20,000,000 3–5.9 METSa counts.min−1 (1017–3696) 97
Bradley et al. [28] Computer Science and Applications (CSA), Inc., Shalimar, FL MVPA 7 days, included for 4 days if non-zero counts from 5 a.m., and 60 min zero after 9 p.m., or 30 min zero after 10 p.m., or last zero count before 12 p.m. I/N 3+ METSa counts.min−1 (1017–3696) 75
Hesketh et al. [5] Manufacturing Technology Inc. accelerometer, Model 7164 MVPA 6 days (24-h periods) included if complete data for at least 4 days <10,000 >20,000,000 3+ METSa counts.min−1 (1017–3696) 89
Sallis et.al. [30] Computer Science and Applications (CSA), Inc., Shalimar, FL model 7164 VPA 7 days complete data included if no negative counts or “no long periods with zero counts” I/N 6+ METSa I/N
Sallis et al. [29] Caltrac accelerometer (Hemokinetics, Inc., Madison, WI) Mean total counts From end of school day I to beginning of school day II, next morning I/N counts.hour−1 76
Sallis et.al. [8]b Caltrac accelerometer (Hemokinetics, Inc., Madison, WI) Mean total counts From end of school day I to beginning of school day II, next morning or during a weekend (Friday to Monday morning)c I/N I/N 5
Eiberg Hansen et al. [22], CoSCIS MTI Actigraph (Manufacturing Technology Inc., Fort Walton Beach, Florida, USA) MVPA 4 days, including one weekend day, included if ≥600 min/day of activity for ≥3 days, and activity between 6 a.m. and 12 p.m. for at least 10 h. <10,000 - >1951 counts.min−1 69.7
Riddoch et al. [20], EYHS Denmark, first cohort MTI Actigraph (Manufacturing Technology Inc., Fort Walton Beach, Florida, USA) MVPA 5 days, including one weekend day, included if ≥600 min/day of activity for ≥3 days, and activity between 6 a.m. and 12 p.m. for at least 10 h. <10,000 - ≥2000 counts.min−1 60
McMinn et al. [26], EYHS Denmark, second cohort MTI Actigraph (Manufacturing Technology Inc., Fort Walton Beach, Florida, USA) MVPA 5 days, including one weekend day, included if ≥600 min/day of activity for ≥3 days, and activity between 6 a.m. and 12 p.m. for at least 10 h. <10,000 >20,000,000 ≥2000 counts.min−1 85
Riddoch et al. [20], EYHS Estonia MTI Actigraph (Manufacturing Technology Inc., Fort Walton Beach, Florida, USA) MVPA 5 days, including one weekend day, included if ≥600 min/day of activity for ≥3 days, and activity between 6 a.m. and 12 p.m. for at least 10 h. <10,000 - ≥2000 counts.min−1 52
Riddoch et al. [20], EYHS Portugal MTI Actigraph (Manufacturing Technology Inc., Fort Walton Beach, Florida, USA) MVPA 5 days, including one weekend day, included if ≥600 min/day of activity for ≥3 days, and activity between 6 a.m. and 12 p.m. for at least 10 h. <10,000 - ≥2000 counts.min−1 44
Riddoch et al. [20], EYHS Norway MTI Actigraph (Manufacturing Technology Inc., Fort Walton Beach, Florida, USA) MVPA 5 days, including one weekend day, included if ≥600 min/day of activity for ≥3 days, and activity between 6 a.m. and 12 p.m. for at least 10 h. <10,000 - ≥2000 counts.min−1 66
  1. MVPA moderate to vigorous physical activity, VPA vigorous physical activity, PA physical activity, I/N insufficient or no information
  2. aCalculated with algorithm from Freedson et al. [33]
  3. bIn the study by Sallis et al. [8], parents reported information on demographic, psychological, and biological circumstances. Data was collected by questionnaires that were distributed by 3648 students from seven schools. A total of 781 returned questionnaires were found complete and available for inclusion in further analysis (21 %). From the pool of 3648 children, 400 were selected at random and invited to wear an accelerometer to monitor the level of PA for 7 days. Accelerometer data for 265 children (66.3 %) were valid and included in further analysis. Of these, complete data from questionnaire and accelerometer was found among 200 (5 %) of the originally sampled 3648 children
  4. cActivity during the school day was not measured