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... operation time was slightly shorter in the off- pump group, accounting for three hours and twenty- eight minutes mean surgery time in the off-pump group versus three hours and forty-nine minutes in the on-pump group (p = 0.15). Mean operation times had no distinc- tive trend throughout the course of the study period (data not shown). Mean duration of ventilation was non-sig- nificantly higher in the off-pump group, with 43.6 hours in the off-pump group versus 13.4 hours in the on-pump group (p = 0.26, Figure 1). Mean length of stay in ICU was with 2.9 days slightly higher in the off-pump group versus 2.2 days in the on-pump group. However, the trimmed mean ventilation times showed 9.35 hours in the off-pump group versus 10.6 hours in the on-pump group, representing a modest reduction in ventilation ...