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. 2019 Oct 23;7(10):e13757. doi: 10.2196/13757

Table 2.

Bivariate correlations among all variables. Correlations for primary hypotheses are in italics.

Variables ρ (P value)

SPPBa (n=52) TUGb (n=51) SF-36 phys compc (n=49) CIRS-Gd (n=52) Age (n=53) BMIe (n=51) Waist to hip ratio (n=52) Sys BPf (n=50) Dia BPg (n=50) Mean HRh (n=53)
HRV TIi (n=53) 0.41j;
(.003)
0.40j;
(.004)
0.37j;
(.009)
−0.43j; (.001) −0.10;
(.47)
0.07;
(.64)
−0.20;
(.16)
0.07;
(.63)
0.01;
(.97)
−0.36j;
(.009)
SPPB k −0.79l;
(≤.001)
0.59l;
(≤.001)
−0.23;
(.11)
−0.29;
(.04)
0.10;
(.48)
−0.08;
(.58)
0.06;
(.69)
0.10;
(.49)
−0.04;
(.80)
TUG −0.39j;
(.007)
0.19;
(.18)
0.40j;
(.004)
−0.15;
(.30)
0.10;
(.50)
−0.02;
(.87)
−0.13;
(.39)
0.18;
(.20)
SF-36 phys comp −0.65l;
(≤.001)
−0.24;
(.10)
0.07;
(.65)
−0.08;
(.59)
−0.08;
(.61)
−0.10;
(.95)
−0.07;
(.65)
CIRS-G −0.20;
(.16)
0.19;
(.19)
−0.05;
(.75)
−0.02;
(.88)
−0.03;
(.84)
0.09;
(.54)
Age −0.14;
(.34)
0.40l;
(.003)
0.35j;
(.01)
0.18;
(.21)
0.00;
(>.99)
BMI 0.01;
(.95)
−0.12;
(.42)
0.13;
(.37)
−0.21;
(.14)
Waist to hip ratio 0.13;
(.36)
0.05;
(.74)
−0.09;
(.51)
Sys BP 0.64l;
(≤.001)
−0.11;
(.46)
Dia BP −0.03;
(.85)

aSPPB: Short Physical Performance Battery.

bTUG: Timed Up and Go.

cSF-36 phys comp: Short Form 36 physical composite score.

dCIRS-G: Cumulative Illness Rating Scale for Geriatrics.

eBMI: body mass index.

fSys BP: systolic blood pressure.

gDia BP: diastolic blood pressure.

hHR: heart rate.

iHRV TI: heart rate variability triangular index.

jP≤.017.

kNot applicable.

lP≤.001.