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Table 3 Mean maximal oxygen uptake (VO2 max) estimatesa (ml kg-1 min-1) among 934 primary schoolchildren from Port Elizabeth, South Africa, in February 2015, stratified by sex, age and Ascaris lumbricoides and Trichuris trichiura infection status

From: Intestinal parasites, growth and physical fitness of schoolchildren in poor neighbourhoods of Port Elizabeth, South Africa: a cross-sectional survey

  A. lumbricoides   T. trichiura  
Non-infected (n = 686) Infected (n = 248) P b Non-infected (n = 727) Infected (n = 207) P b
Sex
 Male (n = 472) (95 % CI) 51.1 (50.7–51.5) 50.0 (49.3–50.6) 0.113 51.1 (50.7–51.5) 49.8 (49.1–50.6) 0.204
 Female (n = 462) (95 % CI) 47.5 (47.2–47.8) 47.4 (46.7–48.0) 0.946 47.5 (47.1–47.8) 47.4 (46.7–48.1) 0.911
Age (years)
 9 (n = 282) (95 % CI) 49.6 (49.1–50.0) 48.6 (47.5–49.6) 0.104 49.6 (49.1–50.0) 48.1 (47.0–49.3) 0.038
 10 (n = 375) (95 % CI) 48.9 (48.4–49.4) 48.8 (48.2–49.5) 0.955 48.9 (48.4–49.4) 48.9 (48.2–49.6) 0.778
 11 (n = 216) (95 % CI) 49.2 (48.4–49.9) 48.8 (47.7–49.8) 0.489 49.3 (48.6–50.0) 48.4 (47.3–49.5) 0.151
 12 (n = 61) (95 % CI) 49.9 (48.7–51.0) 49.0 (47.0–51.1) 0.424 49.2 (48.0–50.5) 50.2 (48.2–52.1) 0.548
  1. aAll mean VO2 estimates are expressed in ml kg−1 min−1 and are adjusted for age, with 95 % confidence intervals in parentheses when appropriate
  2. bAll P-values are calculated using either mixed linear or mixed logistic regression, as appropriate, adjusted for clustering of schools