Stereological estimates of alveolar numbers
| Animals n | Left lung ×103 | Right lung ×103 | Total lung ×103 | |
| Baseline, day 0 | 6 | 487±98 | 643±146 | 1131±55 |
| Post-PNX | ||||
| Day 6 | 6 | 866±228 | 866±228# | |
| Day 20 | 5 | 925±150#, ¶ | 925±150 | |
| Control, day 20 | 4 | 447±247 | 769±164 | 1216±228 |
| All controls | 10 | 471±162 | 694±157 | 1165±145 |
Data are presented as mean±sd, unless otherwise stated. Differences between groups were tested by one-way ANOVA if normality and equal variance were given at p>0.1; otherwise, Kruskal–Wallis one-way ANOVA on ranks was performed. #: p<0.05 versus all controls; ¶: p<0.05 versus baseline.