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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)

From: Validity of a multi-context sitting questionnaire across demographically diverse population groups: AusDiab3

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
  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)