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Table 2 Results of segmented regression models for HIV sentinel seroprevalence and annual reported HIV cases among MSM before and after Treat All policy

From: Impact of immediate initiation of antiretroviral therapy among men who have sex with men infected with HIV in Chengdu, southwest China: trends analysis, 2008–2018

 

Coefficient

Standard error

P value

95% Confidence interval (CI)

HIV sentinel seroprevalence a (Model 1)

β0 (Baseline)

0.1123

0.0059

<  0.001***

(0.0982, 0.1264)

β1 (Structural trend)

0.0087

0.0015

0.001***

(0.0051, 0.0124)

β2 (Change in level)

− 0.0005

0.0087

0.959

(− 0.0210, 0.0201)

β3 (Change in trend)

− 0.0308

0.0025

<  0.001***

(− 0.0366, − 0.0250)

Newly reported HIV cases b (Model 2)

β0 (Baseline)

63.35

37.33

0.133

(−24.92, 151.62)

β1 (Structural trend)

116.38

9.68

<  0.001***

(93.48, 139.28)

β2 (Change in level)

463.23

54.65

<  0.001***

(334.01, 592.45)

β3 (Change in trend)

−158.28

15.47

<  0.001***

(−194.87, −121.69)

  1. a calculated with number of sampled MSM in the annual sentinel survey conducted in Chengdu as denominator and confirmed HIV cases from those MSM as numerator
  2. b newly confirmed HIV cases in CRIMS whose route of infection was male homosexual transmission and address was Chengdu city