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Table 2 Spearman rho correlations between the actigraph accelerometer and the International Physical Activity Questionnaire-Short Form (IPAQ-SF)

From: Assessing physical activity in people with posttraumatic stress disorder: feasibility and concurrent validity of the International Physical Activity Questionnaire– short form and actigraph accelerometers

  N Accelerometer (mins/day) N IPAQ-SF (mins/day) Spearman’s rho correlation
Moderate-vigorous physical activity       
3+ valid days 49 Mean (SD) 40 (31) 37 43 (38) 0.45
   Median (25th% - 75th%) 35 (20–54)   30 (11–69)  
4+ valid days 39 Mean (SD) 42 (31) 29 45 (38) 0.46
   Median (25th% - 75th%) 36 (22–54)   30 (16–69)  
Sedentary time (mins/weekday)       
3+ valid days 38 Mean (SD) Median (25th% - 75th%) 444 (393–550) 474 (119) 34 600 (360–840) 611 (321) 0.33
4+ valid days 29 Mean (SD) Median (25th% - 75th%) 481 (110) 440 (410–536) 27 598 (321) 540 (360–840) 0.29