Skip to main content
. 2007 Mar 13;62(9):814–819. doi: 10.1136/thx.2006.071290

Table 4 Number of subjects in each group showing a significant relative bronchodilator response as determined by the limits of the healthy group for resistance (Rrs) and reactance (Xrs) at 6, 8 and 10 Hz.

Healthy CF nCLD Asthma Wheeze
|ΔRrs6| >42% 3/68 (4.4%) 0/36 (0.0%) 1/49 (2.0%) 2/53 (3.8%) 3/61 (4.9%)
|ΔXrs6| >61% 3/68 (4.4%) 1/36 (2.8%) 0/49 (0.0%) 2/53 (3.8%) 5/61 (8.2%)
|ΔRrs8| >37% 3/78 (3.8%) 1/38 (2.6%) 2/49 (4.1%) 1/55 (1.8%) 2/65 (3.1%)
|ΔXrs8| >67% 4/78 (5.1%) 2/38 (5.3%) 2/49 (4.1%) 2/55 (3.6%) 3/65 (4.6%)
|ΔRrs10| >39% 3/78 (3.8%) 0/38 (0.0%) 0/49 (0.0%) 1/56 (1.8%) 1/66 (1.5%)
|ΔXrs10| >63% 3/78 (3.8%) 1/38 (2.6%) 3/49 (6.1%) 2/56 (3.6%) 2/66 (3.0%)

CF, cystic fibrosis; nCLD, neonatal chronic lung disease; |ΔRrs|, refers to the absolute change in Rrs.