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Table 1 Descriptive statistics for, correlations between, and regression effects of the study variables

From: Dangers of residual confounding: a cautionary tale featuring cognitive ability, socioeconomic background, and education

Predictor

M (SD)

r

Standardized adjusted effect (95% CI) on

CA

Degree

SEB

CA

Degree

1. SEB

47.0 (45.4)a

0.395

0.353

0.258 (0.232; 0.285)

0.186 (0.159; 0.214)

2. CA

0 (1)

0.508

0.278 (0.249; 0.306)

0.429 (0.403; 0.455)

3. Degree

2.54 (1.46)

 

0.200 (0.170; 0.229)

0.428 (0.402; 0.454)

  1. aMean of parents’ total income in 1997 and 1998, in 1000 USD. Log-transformed before the analyses