Table 5

Median and interquartile ranges for the microvessel density for the presence or absence of the different PAS patterns and the mean for the transformed vessel counts. The significance testing is for difference of the means of the transformed counts, as determined by Student’s t test between presence and absence for each PAS pattern

PAS patternMedian value of vessel count Interquartile rangeMean of
transformed count		 Significance
Normal:
Present Absent27
45		19–46
32.5–58		5.65
6.70		0.002
Silence:
Present Absent45.5
35		26–55.5
21–50		6.43
6.02		0.27
Straight vessels:
Present Absent36
41		21–51
23–50		6.02
6.27		0.77
Parallel vessels:
Present Absent44
32.5		28–52
18–50		6.49
5.85		0.06
Parallel with x links:
Present Absent46
34.5		36–59
19–49		7.10
5.92		0.006
Arcs:
Present Absent46.5
31		29–65
19–45		6.65
5.62		0.002
Arcs with branches:
Present Absent46
31		28.5–58
20–42		6.65
5.62		0.002
Loops:
Present Absent46
27		34–70
18–42		0.96
5.46		<0.0005
Networks:
Present Absent50
34		40–77
20.5–46		7.26
5.79		<0.0005