Table 2.

Medial repopulation of control and hydrogel-treated arteries after balloon-induced injury

Group (n)	Number of medial cells/cross section*	Significance relative to control†
Control, 2 days (4)	0  ±  0
PEG-DA, 2 days (4)	0  ±  0	P  =  1.0
Control, 14 days (7)	460  ±  43‡
PEG-L-DA, 14 days (7)	388  ±  40§	P  >  0.2
PEG-DA, 14 days (7)	312  ±  39¶	P  <  0.05
Control, 28 days (10)	459  ±  30
PEG-DA, 28 days (10)	336  ±  52	P  <  0.05
PEG-DA, 28 days no injury (4)	500  ±  39	P  >  0.1
No injury or treatment (4)	516  ±  45

Values are mean ± SEM. 

^*Measured by counting cell nuclei in histological sections stained with hematoxylin and eosin. 

^†By the Mann–Whitney U test. 

^‡6.7  ±  4.3 cells per cross-section were non-SMC, and 0.86  ±  0.90 were inflammatory. 

^§6.4  ±  4.7 cells per cross-section were non-SMC, and 0.43  ±  0.53 were inflammatory. 

^¶5.3  ±  3.7 cells per cross-section were non-SMC, and 0.71  ±  1.11 were inflammatory.