Table 2.

Observed and excess mortality rates, and standardized mortality ratios, among 64,836 HIV-infected patients initiating combination antiretroviral therapy in the China National Free Antiretroviral Treatment Program from 2003 – 2009

Mortality	2003–2004	2005–2007	2008–2009	Total
Observed death	733	3,815	4,029	8,577
Expected death	23.8	166.4	236.6	426.8
Person year at follow up	7,754	55,336	72,419	135,509
Observed mortality rate (95% CI)† (per 100 person-years)	9.5 (8.8 – 10.2)	6.9 (6.7 – 7.1)	5.6 (5.4 – 5.8)	6.3 (6.2 – 6.4)
Excess mortality rate (95% CI)‡ (per 100 person-years)	9.1 (8.5 – 9.8)	6.6 (6.4 – 6.8)	5.2 (5.0 – 5.4)	6.0 (5.9 – 6.1)
Standardized mortality ratio (95% CI)*	30.8 (28.6 – 33.1)	22.9 (22.2 – 23.7)	17.0 (16.5 – 17.6)	20.1 (19.7 – 20.5)

^†Calculated as 100× (observed death/person years at follow up)

^‡Calculated as 100× [(observed death-expected death)/person years at follow up)]

^*Calculated as 100× (observed death/expected death)