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Table 1 Percentage of volume reduction according to Knosp grade in each group

From: Surgical outcome of non-functioning pituitary adenomas: a comparative study between microscopic and endoscopic techniques

Knosp grade Group 1: microscopic Group 2: endoscopic
N % volume reduction N % volume reduction
0 4 88 6 83.4
1 11 92.3 5 92.9
2 2 92.8 7 86.5
3 4 77.4 11 89
4 4 49.2 4 98
Total 25 82.4 33 89.1