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. 2011 Feb 9;6(2):e16878. doi: 10.1371/journal.pone.0016878

Table 1. Characteristics of RCTs of tobacco use and HIV infection included in selected Cochrane systematic reviews and ongoing RCTs selected from international clinical trial registries.

Total Tobacco use HIV infection
All RCTs Ongoing RCTs All RCTs Ongoing RCTs All RCTs Ongoing RCTs
n = 1 086 (%) n = 740 (%) n = 346 (%) n = 668 (%) n = 556 (%) n = 112 (%) n = 418 (%) n = 184 (%) n = 234 (%)
Intervention
• PT 489 (45.0) 283 (38.2) 206 (59.5) 252 (37.7) 201 (36.2) 51 (45.5) 237 (56.7) 82 (44.6) 155 (66.2)
• NPT 597 (55.0) 457 (61.8) 140 (40.5) 416 (62.3) 355 (63.8) 61 (54.5) 181 (43.3) 102 (55.4) 79 (33.8)
Number of participating countries
• 1 1 004 (92.5) 695 (94.0) 309 (89.3) 639 (95.7) 529 (95.1) 110 (98.2) 365 (87.3) 166 (90.2) 199 (85.0)
• 1–5 38 (3.5) 15 (2.0) 23 (6.7) 8 (1.2) 6 (1.1) 2 (1.8) 30 (7.2) 9 (4.9) 21 (9.0)
• 6–10 10 (0.9) 4 (0.5) 6 (1.7) 4 (0.6) 4 (0.7) 0 6 (1.4) 0 6 (2.6)
• >10 12 (1.1) 4 (0.5) 8 (2.3) 2 (0.3) 2 (0.4) 0 10 (2.4) 2 (1.1) 8 (3.4)
• Not reported 22 (2.0) 22 (3.0) -- 15 (2.2) 15 (2.7) -- 7 (1.7) 7 (3.8) --

RCTs: randomized controlled trials. PT: pharmacologic intervention. NPT: nonpharmacologic intervention.