By comparing the two age subgroups, born before and after 1947, we see that the concentrations of neopterin and the tyrosine ratio are increased with age whereas the levels of BCAA, taurine and tryptophan are decreased in the older group (data not shown).
Toxicity and compliance were compared between two age subgroups (<65, ≥ 65) by Fisher exact test and exact Wilcoxon rank-sum test.
The sample consisted of two age subgroups: younger age subgroup (13 to 18 years of age; n = 31) and older age subgroup (19 to 24 years of age; n = 31).
Age standardisation was performed by the direct method with reference to 2010 Chinese national population, 19 using four age subgroups 0, 1–4, 5 9 and 10 14 years as the standard population.
Three age subgroups were defined: 1 month to 2, 2 8, and > 8 years, according to the physiological age-based development of immunity in children [19].
The mixed-age group included data from studies where there were not enough data to separate the subjects into one of the three age subgroups.
Thus, we first measured by ELISA its plasma levels in peripheral blood of 30 euploid and 50 DS individuals, collected in three age subgroups [ 29].
For the four age subgroup analyses, all pooled results are from random-effects models.
We modelled weight change in six sex-by-baseline age subgroups (male, female: 18 to 29 years, 30 to 39 years, and 40 to 66 years), allowing for a variety of different order polynomials.
Sufficient data were reported in the included studies for us to calculate the combined ORs by the different age subgroups and by different disability-type subgroups.
