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Comparison of Mean Peak FVC Differences Between Brothers by Group
| Sibship Number | FVC Difference (L) |
|---|---|
| Discordant Sibships | |
| 1 | 0.83 |
| 2 | 0.95 |
| 3 | 1.22 |
| Mean= 1.00+/−0.20 L | |
| Concordant Sibships | |
| 4 | 0.33 |
| 5 | 0.54 |
| 6 | 0.04 |
| 7 | 0.35 |
| Mean = 0.32+/−0.21 L* |
P < .01 concordant vs. discordant sibships
Abbreviation: FVC, forced vital capacity.
