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Table 2 Comparison of outcomes for the intervention and controls per clinic ('offered HIV testing', 'HIV tested', 'not tested for HIV' and 'declined HIV testing').

From: The impact of provider-initiated (opt-out) HIV testing and counseling of patients with sexually transmitted infection in Cape Town, South Africa: a controlled trial

  STI Total Offered HIV testing (%)
(Total offered/Total STI)
HIV tested (%)
(Total tested/Total STI)
Not tested for HIV (%)
(Total declined/Total STI)
Declined HIV testing (%)
(Total declined/Total offered)
Intervention      
1 451 363 (80.5) 256 (56.8) 107 (23.7) 107 (29.5)
2 520 400 (76.9) 306 (58.8) 94 (18.1) 94 (23.5)
3 412 346 (84.0) 236 (57.3) 110 (26.7) 110 (31.8)
4 850 572 (67.3) 492 (57.9) 80 (9.4) 80 (14.0)
5 425 338 (79.5) 228 (53.6) 110 (25.9) 110 (32.5)
6 249 215 (86.3) 177 (71.1) 38 (15.3) 38 (17.7)
7 146 92 (63.0) 57 (39.0) 35 (24.0) 35 (38.0)
Total* 3053 2326 (76.8) 1752 (56.4) 574 (20.4) 574 (26.7)
Control      
8 421 87 (20.7) 86 (20.4) 1 (0.2) 1 (1.1)
9 174 119 (68.4) 105 (60.3) 14 (8.0) 14 (11.8)
10 388 129 (33.2) 120 (30.9) 9 (2.3) 9 (7.0)
11 166 51 (30.7) 47 (28.3) 4 (2.4%) 4 (7.8)
12 593 197 (33.2) 165 (27.8) 32 (5.4) 32 (16.2)
13 789 669 (84.8) 636 (80.6) 33 (4.2) 33 (4.9)
14 837 684 (81.7) 534 (63.8) 150 (17.9) 150 (21.9)
15 626 333 (53.2) 221 (35.3) 112 (17.9) 112(33.6)
16 320 25 (7.8) 24 (7.5) 1 (0.3) 1 (4.0)
17 373 135 (36.2) 103 (27.6) 32 (8.6) 32 (23.7)
18 164 27 (16.5) 27 (16.5) 0 (0.0) 0 (0)
19 285 211 (74.0) 182 (63.9) 29 (10.2) 29 (13.7)
20 576 449 (78.0) 327 (56.8) 122 (21.2) 122 (27.2)
21 315 290 (92.1) 244 (77.5) 46 (14.6) 46 (15.9)
Total* 6027 3406 (50.7) 2821 (42.7) 585 (8.10) 585 (13.5)
  1. *Note that all the proportions in the 'Total' columns are averaged over clinics to account for clustering