Table 3

Summary regression results for age trends for exclusive breastfeeding

Stratum name

Stratum characteristics

Intercept (95% confidence interval)

Slope (95% confidence interval)

Standard error of the residual


AfrD

Africa: high adult, high child mortality

-0.98 (-1.33, -0.63)

-0.21 (-0.29, -0.14)

1.66

AfrE

Africa: very high adult, high child mortality

0.68 (0.29, 1.07)

-0.38 (-0.47, -0.29)

1.79

AmrB

Americas: low child, low adult mortality

0.23 (-0.20, 0.66)

-0.39 (-0.50, -0.29)

1.14

AmrD

Americas: high adult, high child mortality

0.91 (0.47, 1.34)

-0.39 (-0.49, -0.28)

1.10

EmrB

Eastern Mediterranean: low child, low adult mortality

-0.84 (-1.75, 0.06)

-0.47 (-0.80, -0.14)

0.57

EmrD

Eastern Mediterranean: high adult, high child mortality

0.26 (-0.25, 0.76)

-0.29 (-0.39, -0.18)

0.90

SearB

South-east Asia: low child, low adult mortality

1.01 (0.55, 1.48)

-0.47 (-0.58, -0.35)

0.92

SearD

South-east Asia: high adult, high child mortality

1.03 (0.83, 1.23)

-0.38 (-0.42, -0.33)

0.63

WprB

Western Pacific: low child, low adult mortality

0.58 (-0.15, 1.31)

-0.45 (-0.68, -0.22)

1.49


Regressions use minimum chi-square estimation with dependent variable logarithm of prevalence odds (that is, Log(p/1 - p), where p is prevalence of exclusive breastfeeding), and independent variable oldest month of age by two-month age groups; regressions for category-A countries stratified by geographical and epidemiologic criteria as noted in the table; exclusive breastfeeding estimated for five age groups 0–1 to 8–9 months of age. Data sources listed in the Annex (Additional file 1).

Lauer et al. BMC Medicine 2004 2:26   doi:10.1186/1741-7015-2-26

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