Table 3 NG (A) and CT (B) positive and negative results according to laboratory reference tests by anatomical site

A

Geographical site 

N

Anatomical site

Missing

%

Invalid

%

Positive

%

Negative

%

Total

Prevalence (%)

Italy

299

Pharynx

1

0.3

0

-

12

4.0

286

95.7

299

4.0

Rectum

0

-

1

0.3

15

5.0

283

94.6

299

5.0

Urine

0

-

0

-

8

2.7

291

97.3

299

2.7

Malta

742

Pharynx

10

1.4

3

0.4

44

5.9

685

92.3

742

6.0

Rectum

2

0.3

5

0.7

47

6.3

688

92.7

742

6.4

Urine

30

4.0

1

0.1

16

2.2

695

93.7

742

2.3

Peru (site 1)

267

Pharynx

0

-

0

-

26

9.7

241

90.3

267

9.7

Rectum

3

1.1

1

0.4

25

9.4

238

89.1

267

9.5

Urine

1

0.4

0

-

6

2.2

260

97.4

267

2.3

Peru (site 2)

394

Pharynx

4

1.0

0

-

30

7.6

360

91.4

394

7.7

Rectum

3

0.7

1

0.3

40

10.2

350

88.8

394

10.3

Urine

3

0.7

1

0.3

5

1.3

385

97.7

394

1.3

Total

1702

B

Italy

299

Pharynx

1

0.3

0

-

5

1.7

293

98.0

299

1.7

Rectum

0

-

2

0.7

19

6.4

278

93.0

299

6.4

Urine

0

-

0

-

6

2.0

293

98.0

299

2.0

Malta

742

Pharynx

10

1.3

1

0.1

19

2.6

712

96.0

742

2.6

Rectum

2

0.3

6

0.8

86

11.6

648

87.3

742

11.7

Urine

30

4.0

4

0.6

26

3.5

682

91.9

742

3.7

Peru (site 1)

267

Pharynx

0

-

0

-

11

4.1

256

95.9

267

4.1

Rectum

3

1.1

0

-

33

12.4

231

86.5

267

12.5

Urine

1

0.4

0

-

16

6.0

250

93.6

267

6.0

Peru (site 2)

394

Pharynx

4

1.0

0

-

10

2.5

380

96.5

394

2.6

Rectum

3

0.8

0

-

50

12.7

341

86.5

394

12.8

Urine

3

0.8

0

-

6

1.5

385

97.7

394

1.5

Total

1702