Table 1.
Total sitting time (h/day) assessed by a 10-item, past seven-day recall questionnaire versus by activPAL monitor in Australian adults aged >35 years (n = 700)
| Characteristic | n | Mean (SD) sitting time, h/day | Mean (SD) difference sitting time | r (95 % CI) Self-report vs activPAL | Interaction | |
|---|---|---|---|---|---|---|
| Self-report | activPAL | |||||
| Whole Sample | 700 | 6.85 (2.69) | 8.86 (1.81) | 2.01 (2.45) | 0.46 (0.40, 0.52) | |
| Gender | ||||||
| Women | 388 | 6.43 (2.47) | 8.55 (1.81) | 2.12 (2.26) | 0.47 (0.39, 0.55) | p = 0.69 |
| Men | 312 | 7.36 (2.86) | 9.24 (1.74) | 1.87 (2.66) | 0.42 (0.32, 0.51) | F = 0.16, df = 1 |
| Age group | ||||||
| 35-49 years | 125 | 7.02 (2.80) | 8.78 (1.78) | 1.76 (2.48) | 0.49 (0.35, 0.61) | p = 0.89 |
| 50-64 years | 378 | 7.09 (2.75) | 8.74 (1.86) | 1.65 (2.44) | 0.50 (0.42, 0.57) | F = 0.11, df = 2 |
| ≥65 years | 197 | 6.27 (2.40) | 9.13 (1.70) | 2.86 (2.24) | 0.45 (0.33, 0.55) | |
| BMI category | ||||||
| Normal or underweight <25 kg/m2) | 225 | 6.54 (2.46) | 8.56 (1.69) | 2.02 (2.31) | 0.43 (0.32, 0.53) | p = 0.77 |
| Overweight (≥25– < 30 kg/m2) | 302 | 6.89 (2.75) | 8.78 (1.80) | 1.90 (2.43) | 0.49 (0.40, 0.57) | F = 0.27, df = 2 |
| Obese (≥30 kg/m2) | 173 | 7.18 (2.87) | 9.37 (1.87) | 2.19 (2.65) | 0.44 (0.31, 0.55) | |
| Physical activity category | ||||||
| None (0 min/week) | 63 | 7.23 (2.93) | 9.42 (1.72) | 2.20 (2.73) | 0.43 (0.20, 0.61) | p = 0.68 |
| Insufficient (>0 – <150 min/week) | 160 | 7.17 (2.78) | 9.07 (1.93) | 1.91 (2.56) | 0.45 (0.32, 0.67) | F = 0.38, df = 2 |
| Sufficient (≥150 min/week) | 477 | 6.69 (2.61) | 8.71 (1.76) | 2.02 (2.37) | 0.47 (0.39, 0.53) | |
| Work status | ||||||
| Full-time work | 259 | 7.75 (2.80) | 9.15 (1.88) | 1.40 (2.52) | 0.48 (0.38, 0.57) | p = 0.91 |
| Part-time work | 151 | 6.22 (2.39) | 8.42 (1.78) | 2.20 (2.33) | 0.42 (0.27, 0.54) | F = 0.10, df = 2 |
| Not in paid work | 284 | 6.39 (2.52) | 8.82 (1.72) | 2.43 (2.34) | 0.44 (0.34, 0.53) | |
| Highest qualification | ||||||
| Year 12 or less | 205 | 6.25 (2.38) | 8.63 (1.85) | 2.38 (2.27) | 0.45 (0.33, 0.55) | p = 0.38 |
| Certificate or diploma | 322 | 6.72 (2.63) | 8.83 (1.78) | 2.11 (2.45) | 0.44 (0.35, 0.52) | F = 0.76, df = 1 |
| Degree or post graduate | 169 | 7.80 (2.89) | 9.20 (1.77) | 1.39 (2.56) | 0.48 (0.36, 0.59) | |
| Income | ||||||
| AU$1500+/week | 172 | 7.38 (2.93) | 9.23 (1.75) | 1.84 (2.55) | 0.50 (0.38, 0.61) | p = 0.93 |
| AU$800-1499/week | 244 | 7.00 (2.75) | 8.78 (1.79) | 1.78 (2.40) | 0.46 (0.35, 0.55) | F = 0.07, df = 2 |
| <AU$800/week | 277 | 6.37 (2.52) | 8.73 (1.84) | 2.36 (2.39) | 0.44 (0.34, 0.53) | |
| Marital status | ||||||
| Married or de facto | 539 | 6.79 (2.64) | 8.76 (1.78) | 1.96 (2.39) | 0.47 (0.40, 0.53) | p = 0.56 |
| Not married or de facto | 161 | 7.02 (2.84) | 9.18 (1.86) | 2.16 (2.63) | 0.44 (0.31, 0.56) | F = 0.35, df = 1 |
| Area of residence | ||||||
| Capital city | 438 | 6.94 (2.73) | 8.93 (1.85) | 1.99 (2.44) | 0.49 (0.41, 0.56) | p = 0.27 |
| Not capital city | 262 | 6.69 (2.60) | 8.73 (1.74) | 2.04 (2.46) | 0.42 (0.31, 0.51) | F = 1.21, df = 1 |
Missing data for work status (n = 6), highest qualification (n = 4), and income (n = 7). Standard deviation (SD), Pearson’s correlation (r), 95 % confidence interval (95 % CI). P for difference between groups in association of self-report with monitor-assessed total sitting time (linear regression)