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Table 4 Potential predictors of activity energy expenditure (kJ/kg/day), sleeping heart rate (beats/min), and grip strength (kg) based on simple regression analysis

From: Level and intensity of objectively assessed physical activity among pregnant women from urban Ethiopia

 

Activity energy expenditure 1(kJ/kg/day)

Sleeping heart rate (beats/min)

Grip strength (kg)

Variable

N

Log B (95%CI)2

P

n

B (95%CI)

P

n

B (95%CI)

P

Age (years)

   

304

0.07 (−0.11;0.25)

0.47

303

0.03 (−0.07;0.13)

0.57

Gestational age (weeks)

292

−0.005 (−0.007;-0.002)

0.002

299

0.15 (0.03;0.27)

0.02

298

−0.02 (−0.09;0.04)

0.49

 ≤28

185

Reference

 

189

Reference

 

189

Reference

 

 >28

107

−0.065 (−0.108;-0.023)

0.003

110

1.86 (−0.02;3.74)

0.05

110

−0.66 (−1.70;0.37)

0.21

Gravidity (number)

297

  

304

  

303

  

 1

117

Reference

 

118

Reference

 

117

Reference

 

 2

86

0.005 (−0.046;0.057)

0.84

90

1.10 (−1.09;3.30)

0.32

90

0.82 (−0.42;2.05)

0.20

 ≥3

94

−0.014 (−0.072;0.044)

0.64

96

1.94 (−0.21;4.10)

0.08

96

0.35 (−0.87;1.56)

0.57

Education

297

  

304

  

303

  

 Not completed primary school

133

Reference

 

133

Reference

 

133

Reference

 

 Completed primary school

164

−0.029 (−0.070;0.013)

0.17

304

2.39 (0.59;4.19)

0.01

170

1.14 (0.13;2.15)

0.03

Weight (kg)

297

−0.003 (−0.005;0.000)

0.03

304

0.20 (0.09;0.31)

< 0.001

303

0.17 (0.12;0.23)

< 0.001

Height (cm)

297

0.000 (−0.003;0.004)

0.90

304

0.07 (−0.08;0.23)

0.35

303

0.21 (0.13;0.29)

< 0.001

Body mass index (kg·m2)

297

−0.010 (−0.018;-0.003)

0.01

304

0.54 (0.23;0.85)

0.001

303

0.33 (0.16;0.50)

< 0.001

Arm fat area (cm2)

296

−0.003 (−0.005;0.000)

0.08

303

0.15 (0.03;0.27)

0.01

302

0.09 (0.02;0.16)

0.01

Arm muscle area (cm2)

296

0.004 (0.000;0.007)

0.07

303

0.01 (−0.16;0.17)

0.94

302

0.19 (0.10;0.28)

< 0.001

  1. 1Adjusted for age and cardiorespiratory fitness indicator (m/beat).
  2. 2Data are log-transformed beta-coefficients. The percentage difference in Activity energy expenditure associated with one unit difference in continuous exposure variables or by category is calculated as (10B – 1) x 100% (95%CI).