Table 3

Correlations of Plethysmograph Estimate of Pulsus Paradoxus Physiology with %FEV1 and Airway Resistance

Outcome variable

Baseline*

(r, 95% CI)

Baseline to 2 Hr change*

(r, 95% CI)

Baseline to 4 Hr change*

(r, 95% CI)


%FEV1

-0.44 (-0.56, -0.30)‡

-0.31(-0.5, -0.09)

-0.38 (-0.62, -0.07)

Airway resistance

Age 5 - 10 yr†

0.28 (0.12, 0.42)‡

0.06 (-0.16, 0.28) ¶

0.19 (-0.13, 0.51) ¶

Ages ≥ 11 yr§

0.45 (0.23, 0.63)‡

0.21 (-0.13, 0.52) ¶

0.25 (-0.24, 0.66) ¶


Values are Spearman rank correlation coefficient unless otherwise specified.

*Baseline value is before corticosteroid (CCS) administration. Two and 4 hour time points are times from CCS administration. Correlations at 2 and 4 Hr are for proportionate changes of PEP.

†Percent predicted baseline value and proportionate change of this value at 2 and 4 hr

‡ Pearson correlation coefficient (95% confidence intervals)

§Absolute baseline value (kPa/L/s) and proportionate change of this value at 2 and 4 hr

¶Numbers in parentheses are 95% confidence intervals derived using 1000 bootstrap replications.

Arnold et al. BMC Pulmonary Medicine 2010 10:17   doi:10.1186/1471-2466-10-17

Open Data