a decreasing trendP < 0.001
Before treat-all mean CD4 showed a not significant trend per month (IRR = 0.998, 95% CI : 0.995–1.001; P = 0.196), after treat-all showed a decreasing trend of 0.3% per month (IRR = 0.997, 95% CI : 0.997–0.998; P < 0.001); by the end of 2019, mean CD4 was not significantly different from expected level (IRR = 0.973, 95% CI : 0.842–1.124; P = 0.709).