Table 3

Unadjusted and adjusted ICC for clinicians’ sampling technique with the detection rate of oropharyngeal and anorectal gonorrhoea

Model 1*Model 2†Model 3‡
Unadjusted ICC
(95% CI)
P value§Adjusted ICC
(95% CI)
P value§Adjusted ICC
(95% CI)
P value§
Sampling technique for oropharyngeal swab8.2×10−7 (8.8×10−38 to 1)0.497
 Frequency of swabbing one tonsil only2.3×10−5 (1.1×10−24 to 1)0.4962.9×10−6 (1.5×10−26 to 1)0.495
 Frequency of swabbing both tonsils only1.2×10−4 (1.2×10−81 to 1)0.4965.4×10−6 (1.8×10−19 to 1)0.494
 Frequency of swabbing oropharynx only6.1×10−6 (1.1×10−23 to 1)0.4955.4×10−7 (2.1×10−39 to 1)0.497
 Frequency of swabbing soft palate only1.6×10−4 (3.4×10−29 to 1)0.4952.3×10−6 (1.1×10−39 to 1)0.496
 Frequency of swabbing both tonsils together with oropharynx1.8×10−4 (1.8×10−26 to 1)0.4961.2×10−6 (1.1×10−39 to 1)0.497
 Frequency of gag reflex7.3×10−4 (6.7×10−17 to 1)0.4743.7×10−6 (3.9×10−37 to 1)0.496
Sampling technique for anorectal swab1.7×10−7 (4.3×10−40 to 1)1.000
 Distance of swab inserted from the anal verge (cm)1.2×10−4 (5.8×10−20 to 1)0.4983.9×10−3 (5.5×10−6 to 7.4×10−1)0.373
 Frequency of patient self-collected swabs4.5×10−3 (3.0×10−5 to 4.1×10−1)0.3345.4×10−3 (3.5×10−5 to 4.6×10−1)0.333
 Frequency of clinician-collected swabs without proctoscope3.8×10−3 (1.2×10−5 to 5.6×10−1)0.3564.7×10−3 (1.8×10−5 to 5.6×10−1)0.349
 Frequency of asking patients to relax the anal sphincter3.6×10−3 (1.2×10−5 to 5.3×10−1)0.3554.7×10−3 (2.1×10−5 to 5.2×10−1)0.345
 Frequency of rotating the swab within the anal canal3.0×10−3 (1.8×10−6 to 8.3×10−1)0.3904.2×10−4 (2.0×10−30 to 1)0.487
 Frequency of moistening swab before insertion1.2×10−6 (4.7×10−21 to 1)0.4945.5×10−6 (2.7×10−26 to 1)0.496
  • *Model 1: unadjusted ICCs were calculated for each sampling technique.

  • †Model 2: adjusted ICCs were calculated for each sampling technique alone after adjustment for patients’ characteristics.

  • ‡Model 3: adjusted ICCs were calculated for sampling technique after adjustment for patients’ characteristics and all clinicians’ sampling technique.

  • §Testing the significance of the ICC.

  • ICC, intracluster correlation coefficients.