Table 1. Characteristics of 81 families (1874 individuals) ascertained for asthma.
| All kindreds (n=81) | |
|---|---|
| Mean number of individuals/pedigree (range) | 23 (6–97) |
| Mean number of affecteds/pedigree (range) | 9 (2–40) |
| Mean number of typed affecteds/pedigree (range) | 9 (2–36) |
| Median age (range) | 42 (12–97) |
| Median age at diagnosis (range) | 9 (0–79) |
| % indicating atopic symptomsa | 52 |
| Average predicted FEV1/FVCb (%) | 74.4 |
| Average measured FEV1/FVCb (%) | 83.1 |
| % indicating history of smokinga | 13 |
| % Caucasiona | 99 |
Abbreviations: FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.
a
As per questionnaire.
b
Predictions derived from sex, height and weight.