Although our data do not support stratifying hip replacement cohorts based on sex, our study design might not have been able to detect sex-dependent familial aggregation.
There is some indirect evidence that supports stratifying Her2+ and TN breast cancer into the same high-risk group.
In the first method, using observations on the common support, we stratified the observations based on the propensity score.
Further trials comparing various levels of behavioural support should report outcomes stratified by educational levels.
To ensure that balance groups are achieved in terms of body composition, NIV set-up across the six sites and previous exposure to ventilator support patients will be stratified at randomisation (table 2).
Three building-block solutions are proposed to overcome this transition problem: (1) a 3D-model to support designers in stratifying, elaborating, and formalizing design documents, (2) instructional software templates to support designers in producing software themselves, and (3) an integrative approach to support designers in reusing learning objects.
13 24 Nevertheless, this study indicates a modest, but significant, effect of pollen on suicide risk, which is supported by further analyses stratified by sex, age group and personal history of mood disorder.
To test whether support modified the stress-outcome response, we stratified models of chronic stress by support, adjusting for age, race/ethnicity, and marital status.
Table 6 shows association between health status and family structure stratified by social support.
Sample sizes were not sufficient to support statistical analysis of VCS stratified by age (i.e., child, adult); VCS data were available for only four children.
