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Table 2 Comparison of STI testing of HIV positive MSM attending two general practices during three one-year periods

From: Introduction of a sexual health practice nurse is associated with increased STI testing of men who have sex with men in primary care

Clinic A: Nurse introduced in Period 3 n nt(%) 95% CI % Difference Period 1 to Period 2 % Difference Period 2 to Period 3
Syphilis EIA #      
Period 1 346 296 (86) 82-89   
Period 2 374 303 (81) 77-85 −4 (p = 0.09)  
Period 3 418 321 (77) 73-81   −4 (p = 0.20)
Urine Test      
Period 1 346 135 (39) 34-44   
Period 2 374 169 (45) 40-50 6 (p = 0.12)  
Period 3 418 222 (53) 46-60   8 (p = 0.029)
Anal Swab      
Period 1 346 120 (35) 30-40   
Period 2 374 146 (39) 34-44 4 (p = 0.30)  
Period 3 418 208 (50) 45-55   11 (p < 0.01)
Urine and Anal Tests      
Period 1 346 109 (32) 27-37   
Period 2 374 138 (37) 32-42 5 (p = 0.18)  
Period 3 418 201 (48) 43-53   11 (p < 0.01)
Complete Tests*      
Period 1 346 89 (26) 22-31   
Period 2 374 100 (27) 23-32 1 (p = 0.83)  
Period 3 418 180 (43) 38-48   16 (p < 0.001)
Clinic B: No Nurse n n t (%) 95% CI % Difference Period 1 to Period 2 % Difference Period 2 to Period 3
Syphilis EIA #      
Period 1 773 652 (84) 81-86   
Period 2 830 723 (87) 84-89 3 (p = 0.13)  
Period 3 858 711 (83) 80-85   −4 (p = 0.02)
Urine Test      
Period 1 773 140 (18) 15-21   
Period 2 830 182 (22) 19-25 4 (p = 0.17)  
Period 3 858 185 (22) 19-25   0 (p = 0.31)
Anal Swab      
Period 1 773 106 (16) 13-19   
Period 2 830 133 (18) 15-21 2 (p = 0.07)  
Period 3 858 137 (19) 16-22   1 (p = 0.90)
Urine and Anal Tests      
Period 1 773 79 (10) 8-12   
Period 2 830 120 (14) 12-17 4 (p = 0.013)  
Period 3 858 126 (15) 13-18   1 (p = 0.95)
Complete Tests      
Period 1 773 46 (6) 4-8   
Period 2 830 65 (8) 6-10 2 (p = 0.17)  
Period 3 858 80 (9) 7-11   1 (p = 0.31)
  1. n = number of MSM.
  2. nt = number of tests.
  3. #EIA = Enzyme-linked Immunoassay.
  4. *Complete Tests = HIV antibodies; syphilis EIA; urine test for chlamydia and an anal swab for chlamydia and gonorrhoea collected on the same date.