Table 4.

Final multiple linear regression model of log thymic index for the most experienced radiologist, no. 5 from Svidnik, with log PCBs and other covariates as predictors (n = 187).

Predictor variable	β	SE	p-Value
PCB [natural log-transformed (ng/mg serum lipids)]a	−0.102	0.047	0.033
Sex (male vs. female)	−0.097	0.058	0.100
Smoking	−0.067	0.060	0.263
Alcohol consumption	−0.085	0.059	0.153
Ethnicity (Romani vs. Slovakian/other Eastern European)	0.135	0.079	0.092
Gestational age at delivery (weeks)	0.053	0.023	0.022
Z-score of birth weight	0.113	0.032	< 0.001
Respiratory infection histories	−0.181	0.090	0.046

^aFor units of ng/g, this coefficient is multiplied by 10⁻³.