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Table 3 Comparison of per-operative parameters between three groups

From: Effect of IOP based infusion system with and without balanced phaco tip on cumulative dissipated energy and estimated fluid usage in comparison to gravity fed infusion in torsional phacoemulsification

 

Group A

Group B

Group C

p value

A vs B

A vs C

B vs C

 

CDE (%-seconds)

 Sample size

42

42

42

     

 Mean ± SD

13.14 ± 7.65

11.33 ± 5.14

7.70 ± 4.59

0.001

0.35

0.001

0.001

Kruskal Wallis

 Median

12.38

11.04

6.84

     

 Min-Max

1.48–28.20

2.13–20.86

1.15–16.79

     

 Inter quartile Range

6.40–20.80

7.02–16.21

3.69–11.94

     

EFU (ml)

 Sample size

42

42

42

     

 Mean ± Stdev

58.19 ± 19.10

46.86 ± 12.38

34.81 ± 10.47

<.0001

0.015

<.0001

<.0001

Kruskal Wallis

 Median

55.0

48.5

36.5

     

 Min-Max

30–92

19–74

16–56

     

 Inter quartile Range

40–78

39–56

26–41

     

TAT (seconds)

 Sample size

42

42

42

     

 Mean ± Stdev

172.71 ± 94.92

131.00 ± 45.20

113.36 ± 56.50

0.001

0.299

0.0004

0.002

Kruskal Wallis

 Median

132.5

125.0

95.0

     

 Min-Max

61–437

61–251

63–364

     

 Inter quartile Range

95–245

96–168

79–122

     
  1. CDE= cumulative dissipated energy, EFU= estimated fluid usage, TAT= total aspiration time
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