Table 1.

Effect of porcine pancreatic elastase dose on alveolar fractal box dimension (D_B)

Dose (U/kg)	Mean DB	SEM	Images (N)	*P (compared to control)
0	1.66	0.0016	293	–
40	1.58	0.0035	299	<0.0001
80	1.47	0.0052	372	<0.0001
120	1.47	0.0055	368	<0.0001

Notes:

^*P < 0.0001 for all comparisons of pairs, except that D_B values after instillation of 80 and 120 U/kg did not differ. P = 0.75, R = −0.996. The P value of the global test = 0.007 from the fitted analysis of variance model.

Abbreviation: SEM, standard error of the mean.