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CHAPTER 3.4
The averages obtained at T1 with CASA and SQA-Ve differed significantly (Table 2). The TM
and PM obtained with CASA and SQA-Ve were not significantly correlated (Table 2). The scatter plot
and corresponding Bland-Altman plots showed a very poor agreement between CASA and the SQA-
Ve (Fig. 3).
The categorized data for CASA and SQA-Ve (1.00.43) are summarized in table 3. The
distribution of values ≤30% and >30% between the two devices did not differ significantly (p=0.20).
Table 1. Averages of total (TM) and progressive motility (PM) obtained from frozen-thawed equine
semen following analysis with CASA and with the SQA-Ve (version 1.00.43) at time 1 (T1)
and time 2 (T2), the correlation coefficient (CC) between the values at T1 and T2, and the
mean coefficient of variation (details see text), to assess repeatability of measurements.
CASA SQA-Ve
T1 T2 CC† CV T1 T2 CC‡ CV
TM (%) 39.3 38.1 0.92 6.4 56.1 59.4 0.41 16.9
PM (%) 22.8 22.4 0.95 8.2 45.5 48.8 0.40 16.9
Pearson’s correlation coefficients at a level of † p