The TTM33 group had a significant increase in SVRI compared with TTM36 ( 2595 ; 95 % confidence interval , 2422-2767 ) versus 1960 ( 95 % confidence interval , 1787-2134 ) dynes m ( 2 ) / s per cm ( 5 ) ; P < 0.0001 , respectively ) after 24 hours of cooling with an overall difference of 556 dynes m ( 2 ) / s per cm ( 5 ) ( P ( group ) < 0.0001 ) .