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Table 2 Association of physical activity and daily sitting time with the frailty index (FI)

From: Examining the independent and interactive association of physical activity and sedentary behaviour with frailty in Chinese community-dwelling older adults

  Number FI (mean ± SD) Β (95% CI)
Model 1 P Model 2 P
Physical activity
 Light 235 0.17 ± 0.09 0(Ref.)   0(Ref.)  
 Moderate 922 0.13 ± 0.07 −0.033(−0.044,-0.022) < 0.0001 −0.024(−0.035,-0.013) < 0.0001
 Vigorous 301 0.12 ± 0.06 −0.050(− 0.063,-0.037) < 0.0001 −0.034(−0.047,-0.021) < 0.0001
MET-h/day    −0.0033(− 0.0042,-0.0023) < 0.0001 − 0.0021(− 0.0030,-0.0012) < 0.0001
P value for trend    < 0.0001   < 0.0001  
Daily Sitting time
  <  4 h/day 583 0.12 ± 0.06 0(Ref.)   0(Ref.)  
 4–6 h/day 467 0.14 ± 0.07 0.017 (0.007,0.026) < 0.0001 0.013 (0.003,0.022) 0.007
 6–8 h/day 272 0.14 ± 0.08 0.014 (0.002,0.025) < 0.0001 0.011 (0.001,0.022) 0.039
  ≥ 8 h/day 136 0.16 ± 0.09 0.039 (0.024,0.053) < 0.0001 0.034 (0.020,0.048) < 0.0001
Per h increased    0.0038 (0.0020,0.0055) < 0.0001 0.0034 (0.0017,0.0051) 0.000
P value for trend    < 0.0001   < 0.0001  
  1. Multivariable model 1 adjusted for PA level and ST; model 2 adjusted for educational level, living status, marital status, economic income, drinking status, comorbidity, and polypharmacy
  2. SD Standard deviation, CI Confidence interval