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. 1999 Jan-Mar;3(1):19–22.

Table 1.

Effect of operator grade and presence or absence of acute cholecystitis on duration of operation (minutes).

Surgeon Resident

# of Cases Operating Time (min ± SEM) # of Cases Operating Time (min ± SEM)
Elective 124 97 ± 42 74 119 ± 33a
Acute cholecystitis 38 111 ± 54b 15 145 ± 50c

Statistical comparison of duration of operation was performed by chi-squared test. a vs c and b vs c both significantly different, p < 0.05.