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Comparision of Difference in % Predicted FVC Between Brother at Oldest Comparable Age by Group
| Sibship Number | Difference in % Predicted FVC | Age at Comparison |
|---|---|---|
| Discordant Sibships | ||
| 1 | 18.5 | 18.5 |
| 2 | 20 | 17.0 |
| 3 | 47 | 26.2 |
| Mean +/− SD = 28.5 +/−16% | ||
| Concordant Sibships | ||
| 4 | 10 | 16.2 |
| 5 | 1 | 21.7 |
| 6 | 2 | 14.9 |
| 7 | 7 | 19.7 |
| Mean +/− SD = 5.3 +/− 4.4%* |
P < .04 concordant vs. discordant sibships.
Abbreviations: FVC, forced vital capacity; SD, standard deviation.
