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Table 3 Relationship between pollutants (PM10 and O3) and Daily steps count, hours spent outdoors, health status (CAT score), PEFR, dyspnoea, over the full week including Saturday and Sunday; with allowance for season, linear trend, day-length, temperature, sunshine, rain and wind

From: Influence of weather and atmospheric pollution on physical activity in patients with COPD

 

Effect of 1 μg/m3 PM10

Effect of 1 μg/m3 O3

 

Regression coefficient

95 % CI

p-value

Regression coefficient

95 % CI

p-value

Step count

-5.4

-12.2 to 1.3

0.112

-8.0

-13.5 to -2.4

0.005

Hours outdoors

2.3 × 10-3

-6.5 × 10-3 to 1.8 × 10-3

0.275

-9.9 × 10-3

-14.2 × 10-3 to -5.6 × 10-3

<0.001

CAT score

9.8 × 10-3

-19.6 × 10-3 to 39.1 × 10-3

0.515

16.0 × 10-3

-14.0 × 10-3 to 45.9 × 10-3

0.296

PEFR

-0.077

-0.17 to 0.018

0.110

-0.089

-0.18 to 0.001

0.054

Dyspnoea

-0.41 × 10-3

-8.0 × 10-3 to 7.1 × 10-3

0.915

6.6 × 10-3

1.3 × 10-3 to 12.0 × 10-3

0.015