Table 1—

Clinical characteristics of normal subjects and asthmatic patients.

Subject No:Age yrsSexSkin-testFEV1 % predFVC % predPC20 mg·mL−1
Normals
128Mneg92103>32
233Mneg112119>32
337Fneg107120>32
432Mneg91100>32
527Mneg97110>32
627Mneg87107>32
724Fneg9598>32
830Fpos96100>32
922Fneg108102>32
1023Fneg8395>32
1124Fneg10399>32
Asthmatics
138Fpos82100N/A
233Mpos8698N/A
343Mpos7595N/A
427Fpos77960.36
524Fpos76951.607
624Fpos981020.21
742Mpos76994.94
833Mpos961021.14
926Fpos106105N/A
1022Mpos981074.6
  • FEV1: forced expiratory volume in one second

  • FVC: forced vital capacity

  • PC20: provocative concentration causing a 20% fall in FEV1

  • N/A: not available

  • M: male

  • F: female

  • pos: positive

  • neg: negative