|
(1) Leukocyte esterase*
|
(2) Nitrite
|
(3) Combined dipsticks
|
|---|
| |
Culture positive
|
Culture negative
| |
Culture positive
|
Culture negative
| |
Culture positive
|
Culture negative
|
|---|
|
Leukocyte positive
|
6 (11%)
|
40 (76%)
|
Nitrite positive
|
2 (4%)
|
2 (4%)
|
Both positive
|
0 (4%)
|
2 (4%)
|
|
Leukocyte negative
|
6 (11%)
|
1 (2%)
|
Nitrite negative
|
10 (19%)
|
39 (73%)
|
Both negative
|
4 (8%)
|
1 (2%)
|
|
(4) Pyuria
|
(5) ATP*
|
(6) IB*
|
| |
Culture positive
|
Culture negative
| |
Culture positive
|
Culture negative
| |
Culture positive
|
Culture negative
|
|
Pyuria positive
|
9 (17%)
|
35 (66%)
|
ATP >50 nmol/l
|
3 (6%)
|
0 (0%)
|
IB positive
|
1 (2%)
|
22 (41%)
|
|
Pyuria negative
|
3 (6%)
|
6 (11%)
|
ATP <50 nmol/l
|
9 (17%)
|
41 (77%)
|
IB negative
|
11 (21%)
|
19 (36%)
|
|
(7) Combined ATP and IB**
| | | | | | |
| |
Culture positive
|
Culture negative
| | | | | | |
|
ATP >50, IB positive
|
1 (2%)
|
0 (0%)
| | | | | | |
|
ATP <50, IB negative
|
0 (0%)
|
18 (34%)
| | | | | | |
- *denotes Fisher’s exact test <0.05. **denotes Fisher’s exact test =0.0556 (not quite significant). See Methods for an explanation of the surrogate markers used. Key: IB, intracellular bacteria.
- Data not included in the contingency tables: with respect to combined dipstick tests; 6 patients (10%) were leukocyte positive/nitrite negative and culture positive; 37 patients (70%) were leukocyte positive/nitrite negative and culture negative; 2 patients (4%) where leukocyte negative/nitrite positive and culture positive; 1 patient (2%) was where leukocyte negative/nitrite positive and culture negative. With respect to combined ATP and IB; 9 patients (17%) were IB positive/ATP <50 and culture positive; 22 patients (41%) were IB positive/ATP <50 and culture negative; 3 patients (6%) were IB negative/ATP >50 and culture positive; 0 patients were IB negative/ATP >50 and culture negative.
