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Table 2 Comparison between culture techniques and procedures for culture-negative and culture-positive peritonitis patients

From: Comparison of clinical outcomes between culture-negative and positive peritonitis in patients undergoing maintenance peritoneal dialysis: a prospective cohort study

Variable

CNP

N = 35

CPP

N = 46

p-value

Where is the PDF collected for culture? (%)

Ward

28 (80.0)

27 (58.7)

0.063

Dialysis unit

7 (20.0)

15 (32.6)

Emergency department

0 (0.0)

4 (8.7)

What is the dwell time of PDF collected for culture?

< 1 h

0 (0.0)

1 (2.2)

0.148

1–2 h

15 (42.9)

11 (23.9)

> 2 h

20 (57.1)

34 (73.9)

What is the time between PDF collected and sent to laboratory?

< 2 h

31 (88.6)

38 (82.6)

0.665

> 2 h

4 (11.4)

8 (17.4)

Before obtaining PDF for culture, what amount of PDF was discarded from the catheter?

< 10 mL

32 (91.4)

37 (80.4)

0.287

> 10 mL

3 (8.6)

9 (19.6)

How was PDF collected for culture?

Hemoculture bottle

18 (51.4)

38 (82.6)

0.006

Sterile tube

17 (48.6)

8 (17.4)

What is the cultured method of the PDF collected?

Hemoculture

18 (51.4)

36 (78.3)

0.021

Agar pate

17 (48.6)

10 (21.7)

How much of PDF inoculated for culture?

< 5 ml

18 (51.4)

8 (17.4)

0.003

> 5 ml

17 (48.6)

38 (82.6)

Number of specimens sent for culture

1

35 (100)

43 (93.5)

0.344

 1

0(0)

3 (6.5)

  1. CNP: culture-negative peritonitis, CPP: culture-positive peritonitis, PDF: peritoneal dialysis fluid, hr: hour, ml: milliliter