Table 2.
Sitting time spent in specific contexts (h/day) as recalled over the past seven days and relative validity against monitored sitting time (activPAL) in Australian adults aged >35 years (n = 700)
| Overall | Weekday | Weekend day | ||||
|---|---|---|---|---|---|---|
| Median (25th, 75th percentile) | Correlation (95 % CI) | Median (25th, 75th percentile) | Correlation (95 % CI) | Median (25th, 75th percentile) | Correlation (95 % CI) | |
| Questionnaire, h/day | ||||||
| Work | 0.71 (0.00, 3.57) | ρ = 0.25 (0.17, 0.31) | 0.83 (0.00, 4.80) | ρ = 0.34 (0.27, 0.40) | 0.00 (0.00, 0.00)a | ρ = 0.07 (0.00, 0.14) |
| Transport | 0.67 (0.33, 1.07) | ρ = 0.07 (-0.01, 0.14) | 0.60 (0.31, 1.00) | ρ = 0.12 (0.05, 0.20) | 0.50 (0.05, 1.00) | ρ = -0.04 (-0.11, 0.04) |
| TV | 1.71 (0.86, 2.50) | ρ = 0.16 (0.09, 0.24) | 1.70 (0.80, 2.60) | ρ = 0.09 (0.01, 0.16) | 2.00 (1.00, 2.50) | ρ = 0.23 (0.16, 0.30) |
| Computer | 0.43 (0.07, 1.00) | ρ = 0.14 (0.06, 0.21) | 0.40 (0.00, 1.00) | ρ = 0.12 (0.05, 0.19) | 0.25 (0.00, 1.00) | ρ = 0.10 (0.03, 0.17) |
| “Other” sitting | 1.43 (0.86, 2.14) | ρ = 0.06 (-0.02, 0.13) | 1.15 (0.64, 2.00) | ρ = -0.01 (-0.09, 0.06) | 1.96 (1.00, 2.71) | ρ = 0.11 (0.04, 0.18) |
| Total (sum of above) | Mean 6.85 (SD = 2.69) | r = 0.46 (0.40, 0.52) | Mean 7.34 (SD = 3.21) | r = 0.49 (0.43, 0.54) | Mean 5.62 (SD = 2.66) | r = 0.25 (0.19, 0.32) |
| activPAL, h/day | ||||||
| Monitored sitting time | Mean 8.86 (SD = 1.81) | - | Mean 8.96 (SD = 1.98) | - | Mean 8.48 (SD = 2.10) | - |
Data for sitting times are median (25, 75 %) except where indicated as mean (SD). Spearman’s correlation (ρ), Pearson’s correlation (r), findings in bold are significant. aOnly 124 participants reported sitting for work on the weekend with median time of 1.50 h/day (25 %: 0.75, 75 %: 2.50) within those who worked