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Table 2 Average physical activity, air pollution concentrations and other environmental variables in the last seven days before survey

From: The association between ambient fine particulate air pollution and physical activity: a cohort study of university students living in Beijing

Survey order

1nd

2rd

3rd

4th

Dependent variable

 Vigorous PA (weekly minutes), mean (SD)

95.81

(112.16)**

104.76

(90.62)**

77.18

(97.50)***

126.90

(104.29)***

 Moderate PA (weekly minutes), mean (SD)

213.46

(175.24)**

195.64

(147.34)***

157.94

(131.37)***

177.35

(128.34)***

 MVPA (weekly minutes), mean (SD)

289.75

(226.77)

286.96

(194.32)

229.83

(183.69)***

300.55

(188.60)

 Walk PA (weekly minutes), mean (SD)

71.91

(115.73)

69.64

(112.51)

73.30

(102.43)*

81.05

(108.85)**

 Sedentary behavior (hour/day), mean (SD)

8.96

(2.78)***

9.43

(2.91)**

9.21

(2.85)*

9.21

(2.92)*

 Sleeping behavior (hour/day), mean (SD)

7.68

(0.85)

7.66

(0.91)

7.87

(0.86)***

7.79

(0.99)***

 Total Met, mean (SD)

1835.67

(1381.20)

1848.72

(1221.28)

1501.97

(1151.37)***

1994.27

(1228.22)***

Independent variables

 PM2.5 (μg/m3), mean (SD)

72.90

(50.26)

68.78

(58.48)

165.13

(131.98)***

92.88

(70.43)*

Covariates variables

 Temperature (°C), mean (SD)

25.36

(2.87)

11.64

(4.20)***

12.17

(5.13)***

28.73

(3.00)

 Wind (m/s), mean (SD)

3.23

(0.75)

3.55

(0.65)

3.38

(1.00)

3.41

(0.44)

 Rain %, mean (SD)

0.36

(0.51)

0.18

(0.41)

0.08

(0.29)

0.18

(0.41)

  1. Results of repeated measures one-way ANOVA analysis. * P < 0.05; ** P < 0.01; *** P < 0.001