Early scientific training is first included
as a covariate in Model 2, which omits post-training variables such as current institution.
Continuous measures were evaluated using end - point analysis with baseline
score as covariates in both modified intention - to - treat and completer analyses for the self - reported measures, ICG, Work and Social Adjustment Scale, and Beck Depression and Anxiety Inventory scales.
Marital satisfaction differed across these venues [F (5, 2,381) = 6.42, P < 0.001](Table 2), and repeating the analysis using year of marriage, sex, age, educational background, household income, ethnicity, religious affiliation, and employment
status as covariates did not change these results [F (5, 2,273) = 5.91, P < 0.001].
A 3 (sibling type) x 2 (attachment to sibling and to romantic partner) mixed - model ANCOVA with repeated measurements on the second factor and with
age as covariate on the attachment functions, revealed that the sibling types differed significantly in the degree of their attachment, F (2, 327) = 27.84, p <.001, η2partial =.15.
Potential moderating variables (i.e., study design characteristics, contextual factors, structural elements, and specific intervention practices) were examined by testing them in a three - level meta - analytic
model as covariates.
Subsequently, we added gender and SES
variables as covariates to the LTA model to obtain transition probabilities for boys and girls and for low SES and high SES groups.
Where program effects were moderated by the child's sex in a coherent way, we have noted this in the presentation of the findings, in which case the model includes
SES as a covariate rather than a classification factor and includes all interactions among treatment, marital status, and sex.
Both studies
considered as covariates of child gender, ethnicity and birth weight, maternal educational level, maternal smoking and alcohol use, and family income.
Univariate generalized linear models were used to determine the estimated marginal means of the PedsQL scales and subscales adjusting for the child's age, sex, maternal education, and disadvantage
index as covariates.
For the regression analysis involving each dependent variable, we entered intervention status
as a covariate on step 1.
A regression examining the interaction of adolescent - reported firm control and age, with
gender as a covariate, was conducted predicting adolescent - reported psychological control as the dependent variable.
Marital satisfaction differed across these venues [F (5, 2,381) = 6.42, P < 0.001](Table 2), and repeating the analysis using year of marriage, sex, age, educational background, household income, ethnicity, religious affiliation, and employment status
as covariates did not change these results [F (5, 2,273) = 5.91, P < 0.001].
We did not include age
as a covariate due to the high correlation between age and generation (r =.83) and the possible problems with multicollinearity.
The relationship remained significant when per capita Gross Domestic Product was entered
as a covariate as well as when latitude, a measure of historical climate as well as ultraviolet radiation exposure (Hancock et al., 2008), was controlled for.
Included in
analyses as a covariate, NMQ was assessed by averaging responses to three questions: «How much do they criticize you?»
Using age - and gender - specific z scores for the repeated measures outcome variable and birth
weight as the covariate, the between - group variable (breastfeeding medication group) was significant (P =.005).
If so, the omission of
PPH as a covariate will have made the risk associated with planning a hospital birth appear higher.
To be conservative, all biomarker changes were re-analyzed with changes in
monocytes as a covariate and none of the results changed in a meaningful way.
These evidences are confirmed also when introducing age and
BMI as covariates into the whole population, ie, insulin sensitivity decreased with increasing BMI at the same rate for both men and women in all glucose tolerance categories, whereas insulin secretion increased with BMI at a faster rate in men, which better compensated the increasing insulin resistance.
Next, we examined how activity differed between correct and incorrect trial outcomes for context dependent rules using behavioral
performance as a covariate.
Sullivan and Bal studied one Midwestern urban school district and found that while socioeconomic controls attenuate the impact of race, black students remain more likely than others to be identified for special education; they did not include student
achievement as a covariate.
Outcomes that were infrequent (and highly skewed) were analyzed by means of a generalized MMANOVA using all clients with any outcome data (n = 97), with the pretreatment
values as a covariate.