Skip to main content

Table 3 Mean (SD) time and percentage of awake time spent in various activities on day-shift, night-shift and non-work days, as determined by activPAL3

From: A hard day’s night: time use in shift workers

  Workplace 1 Workplace 2
Day shift
(n = 7)
Night Shift
(n = 5)
Non-work day
(n = 6)
Day shift
(n = 19)
Night Shift
(n = 16)
Non-work day
(n = 16)
Valid Days: per person Median (IQR) 2.6 (1.5; 2.5) 2.2 (2.0;2.5) 3.0 (3.0; 3.5) 2.0 (1.0;4.0) 3.0 (3.0;3.0) 2.7 (2.0;4.0)
Awake (hours per day) 16.5 ± 1.96# 17.6 ± 3.13# 15.3 ± 1.31 13.4 ± 2.61# 22.2 ± 3.66#☼☀ 15.2 ± 1.89
Sitting
 Hrs/day 11.1 ± 2.80# 12.0 ± 3.73 9.2 ± 2.05 6.5 ± 2.43# 11.4 ± 2.72☼☀ 8.2 ± 1.55
 % awake 66.6 ± 12.79# 66.4 ± 10.39# 59.9 ± 10.29 47.24 ± 12.72# 51.4 ± 8.31# 54.5 ± 10.42
Sitting (in bouts ≥ 30 min)
 Hrs/day 4.0 ± 2.19# 5.4 ± 2.48 4.4 ± 2.20 2.4 ± 1.49# 4.7 ± 2.72 3.8 ± 1.96
 % awake 24.08 ± 12.32 29.75 ± 10.21 28.0 ± 12.48 17.3 ± 9.74 20.6 ± 9.64 24.8 ± 13.21
Standing
 Hrs/day 3.8 ± 1.41 4.0 ± 0.86# 4.0 ± 1.03 4.8 ± 1.32 7.2 ± 2.06#☼☀ 4.6 ± 1.40
 % awake 23.21 ± 10.14# 24.00 ± 9.65# 26.3 ± 6.62 36.4 ± 10.03# 32.5 ± 6.33# 30.32 ± 8.27
Stepping
 Hrs/day 1.7 ± 0.60 1.7 ± 0.40# 2.1 ± 0.76 2.2 ± 0.79 3.6 ± 1.15#☼☀ 2.4 ± 1.08
 % awake 10.2 ± 3.67#☼ 9.6 ± 2.23# 13.8 ± 5.43 16.4 ± 5.16# 16.1 ± 4.23 # 15.2 ± 5.33
Steps (n/day) 3872 (511.87) 3938 (421.58)# 4739 (796.34) 5229 (392.06) 8275 (628.86)#☀☼ 5207 (578.33)
  1. IQR: 25th and 75th percentiles
  2. #Difference between workplace 1 and workplace 2, p < 0.05 using independent t-test; Different from non-work day, p < 0.05; Different from day shift days, p < 0.05; Different from night shift days p < 0.05 using paired t-test statistics