Table 1 Exposure to different classes of antiretroviral drugs among individuals from the UK CHIC study

Nucleoside reverse transcriptase inhibitors Protease inhibitors Non-nucleoside reverse transcriptase inhibitors Any antiretroviral drug Year No of patients under follow up No (%) exposed Median (range) No of drugs No (%) exposed Median (range) No of drugs No (%) exposed Median (range) No of drugs No (%) exposed Median (range) No of drugs 1996 7 588 3086 (40.7) 0 (0-5) 1063 (14.0) 0 (0-3) 291 (3.8) 0 (0-2) 3130 (41.2) 0 (0-9) 1997 7 918 4277 (54.0) 2 (0-6) 2656 (33.5) 0 (0-4) 910 (11.5) 0 (0-2) 4328 (54.7) 2 (0-11) 1998 8 599 5231 (60.8) 2 (0-7) 3607 (42.0) 0 (0-4) 2040 (23.7) 0 (0-3) 5266 (61.2) 3 (0-14) 1999 9 170 5992 (65.3) 2 (0-7) 3973 (43.3) 0 (0-5) 3363 (36.7) 0 (0-4) 6017 (65.6) 3 (0-14) 2000 9 775 6643 (68.0) 2 (0-7) 4114 (42.1) 0 (0-6) 4461 (45.6) 0 (0-4) 6661 (68.1) 3 (0-16) 2001 10 549 7340 (69.6) 2 (0-7) 4312 (40.9) 0 (0-6) 5315 (50.4) 1 (0-4) 7356 (69.7) 3 (0-16) 2002 11 200 7973 (71.2) 2 (0-7) 4561 (40.7) 0 (0-6) 5986 (53.5) 1 (0-4) 7987 (71.3) 4 (0-16)