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Table 4 Pearson coefficient correlation (r) and Bland-Altman agreement analysis for quantitative measures of lowest CD4+ T-cell count and highest viral load before cART between HIV-BCS and SISCEL databases

From: Validation of CD4+ T-cell and viral load data from the HIV-Brazil Cohort Study using secondary system data

Sites of HIV-BCSa

CD4+ T-cell

HIV viral load (log)

Correlation

Agreement

Correlation

Agreement

r

p-value

Mean Diff

CI95%c

p-value#

r

p-value

Mean Diff

CI95%c

p-value#

I

0.994

< 0.001

0.16

− 1.22 to 1.55

0.815

0.997

< 0.001

0.0110

−0.040 to 0.017

0.429

II

0.974

< 0.001

0.14

−0.67 to 0.95

0.733

0.990

< 0.001

−0.0026

−0.032 to 0.027

0.859

III

0.956

< 0.001

0.71

−2.96 to 4.39

0.701

0.979

< 0.001

0.0075

−0.048 to 0.063

0.790

IV

0.921

< 0.001

0.00

b

b

0.994

< 0.001

− 0.0040

−0.039 to 0.031

0.822

V

0.997

< 0.001

0.00

b

b

0.995

< 0.001

− 0.0100

−0.031 to 0.011

0.327

VI

0.990

< 0.001

1.38

−1.7 to 4.51

0.386

0.965

< 0.001

−0.0110

− 0.040 to 0.018

0.453

VII

0.995

< 0.001

−0.03

−0.11 to 0.38

0.318

0.989

< 0.001

−0.0026

−0.036 to 0.035

0.989

VIII

0.956

< 0.001

−0.02

−2.17 to 2.12

0.981

0.950

< 0.001

−0.0050

−0.020 to 0.009

0.466

IX

0.946

< 0.001

0.85

−2.02 to 3.70

0.562

0.973

< 0.001

−0.0170

− 0.051 to 0.016

0.312

X

0.978

< 0.001

0.84

−1.85 to 3.54

0.540

0.965

< 0.001

0.0060

−0.010 to 0.030

0.634

XI

0.942

< 0.001

−0.96

−3.51 to 1.59

0.460

0.975

< 0.001

0.0030

−0.014 to 0.021

0.686

XII

0.967

< 0.001

−0.50

−1.5 to 0.58

0.361

0.990

< 0.001

0.0040

−0.027 to 0.035

0.800

XIII

0.971

< 0.001

−0.36

−2.00 to 1.33

0.673

0.966

< 0.001

0.0110

−0.017 to 0.020

0.903

Total

0.970

< 0.001

0.073

−0.07 to 0.88

0.861

0.971

< 0.001

−0.0025

−0.010 to 0.005

0.509

  1. # Null hypothesis means (DIFF) = 0
  2. aI - Manaus – FMT; II - Belém UREDIP; III - Santarém - Municipal STF; IV - Recife - HC/UFPE; V - J. Guararapes - MUNICIPAL STF; VI - Salvador – HUPES; VII - Salvador - CEDAP; VIII - Rio de Janeiro – IPEC; IX Belo Horizonte - UFMG; X - São Paulo - CRT/SP; XI - São Paulo - Municipal Network; XII - SAE S.J.R.P - MUNICIPAL STF; XIII - Porto Alegre – PARTENON;
  3. bStatistics were not calculated because the standard deviation is zero;
  4. cIncluding upper and higher limits of the confidence interval CI95%
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BMC Infectious Diseases

ISSN: 1471-2334

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