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Table 4 Study outcomes for pre-specified primary and secondary endpoints

From: A double blind randomized placebo control crossover trial on the effect of dietary nitrate supplementation on exercise tolerance in stable moderate chronic obstructive pulmonary disease

 

PL phase mean

BR phase mean

95% CI*

P value+

ESWT walking distance (m)

721.6 ± 587.5

800.0 ± 584.3

−314.3 to 157.5

0.494

ESWT walking time (min)

9.9 ± 7.5

10.5 ± 6.0

−3.4 to 2.3

0.693

Borg scale

3.41 ± 2.0

3.1 ± 1.6

−0.2 to 0.9

0.244

Systolic blood pressure prior to ESWT (mmHg)

132 ± 16.2

134.6 ± 18.2

−12.9 to 7.8

0.962

Systolic blood pressure after ESWT (mmHg)

159.8 ± 26.6

169.1 ± 29.7

−29.1 to 10.5

0.336

  1. *95% confidence interval; +paired sample two tailed t-test.