Table 2

Variation in, and absolute stable Heart Rate, Oxygen Saturation and peak-expiratory flow (PEF) by patient and COPD disease characteristics; n = 31.

Age1

Sex F vs. M2

Current Smoker vs. Not2

FEV1 (% predicted)1

Exacerbation Frequency (previous yr)3


Mean Heart Rate (min-1)

r = -0.28

80 vs. 77

77 vs. 78

r = -0.26

rho = 0.23

p = 0.134

p = 0.525

p = 0.862

p = 0.164

p = 0.207

SD Heart Rate (min-1)

r = -0.39

4.7 vs. 5.0

4.5 vs. 4.9

r = -0.35

rho = -0.05

p = 0.030*

p = 0.724

p = 0.713

p = 0.054

p = 0.797

Mean Oxygen Saturation (%)

r = 0.08

94 vs. 95

95 vs. 95

r = 0.14

rho = 0.21

p = 0.688

p = 0.358

p = 0.644

p = 0.470

p = 0.266

SD Oxygen Saturation (%)

r = 0.17

1.2 vs. 0.9

1.0 vs. 1.0

r = -0.21

rho = -0.03

p = 0.350

p = 0.027*

p = 0.769

p = 0.267

p = 0.862

Mean PEF (lmin-1)

r = -0.03

198 vs. 248

258 vs. 225

r = 0.25

rho = 0.09

p = 0.858

p = 0.085

p = 0.378

p = 0.172

p = 0.647

SD PEF (lmin-1)

r = -0.02

12 vs. 11

10 vs. 12

r = 0.10

rho = 0.00

p = 0.921

p = 0.834

p = 0.446

p = 0.608

p = 0.982


(Statistics: 1= Pearson correlation. 2= t test. 3= Spearman correlation).

Hurst et al. BMC Pulmonary Medicine 2010 10:52   doi:10.1186/1471-2466-10-52

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