Effects of long-term low-level radiation exposure after the Chernobyl catastrophe on immunoglobulins in children residing in contaminated areas: prospective and cross-sectional studies

Table 4 Concentrations of serum immunoglobulin A in children 8–11 years examined in cross-sectional study 2008-2010

Model 1	Adjusted mean^ain g/L (95% CI)	p-value^b	Model 2	Adjusted mean^ain g/L (95% CI)	p-value^b
¹³⁷Cs in soil, kBq/m²			¹³⁷Cs in milk, Bq/L
<116	1.76 (1.43-2.09)	0.0067	≤15	1.68 (1.41-1.96)	0.0265
116 – 164	1.25 (0.88-1.63)^*		16-85	1.60 (1.34-1.86)
165 - 265	1.95 (1.77-2.13)		>85	2.02 (1.81-2.23)^*
Gender			Gender
Female	1.64 (1.40-1.88)	0.8741	female	1.77 (1.56-1.97)	0.9934
Male	1.66 (1.46-1.86)	0.8741	Male	1.77 (1.68-1.96)	0.9934
ETS			ETS
Unexposed	1.71 (1.49-1.92)	0.4283	Unexposed	1.81 (1.63-1.99)	0.5436
Exposed	1.60 (1.37-1.83)	0.4283	Exposed	1.73 (1.51-1.94)	0.5436
Age			Age
8	1.30 (0.96-1.65)	0.0295	8	1.51 (1.19-1.82)	0.1189
9	1.99 (1.70-2.27)		9	2.04 (1.75-2.33)
10	1.67 (1.35-1.98)		10	1.77 (1.45-2.08)
11	1.65 (1.38-1.91)		11	1.76 (1.54-1.98)

ETS: Exposure to environmental tobacco smoke; CI: Confidence interval.
^aLinear regression model adjusted for gender, age and ETS. Exposures to cats, dogs or indoor heating mode were not confounding and did not need to be controlled for.
^bF-test in general linear models.
^*p < 0.05.

ISSN: 1476-069X