Table 2

Comparison by two observers of different methods for measuring haemorrhage volume (cm3) on CT scans: ABC/2 versus modified ABC/2 versus SAS

Haematoma volumeDifferencep ValueICC
Observer 1
n=548
 ABC/2
12.77 (16.32)
Modified ABC/2
8.90 (9.21)
3.96<0.00010.84
 ABC/2
12.77 (16.32)
SAS
12.76 (13.06)
−0.011.00
 SAS
12.76 (13.06)
Modified ABC/2
8.90 (9.21)
3.97<0.0001
Observer 2
n=193
 ABC/2
12.05 (12.40)
Modified ABC/2
9.70 (10.05)
2.67<0.00010.96
 ABC/2
12.05 (12.40)
SAS
11.08 (11.38)
0.050.89
 SAS
11.08 (11.38)
Modified ABC/2
9.70 (10.05)
1.38<0.0001
  • Data are mean (SD), difference (Δ) in haemorrhage volume between ABC/2 and SAS and ICC.

  • ICC, intraclass correlation coefficient; SAS, semiautomated segmentation.