Regression coefficients from the linear regression analysis for the response variable, IgG values, and the covariates age and sex (female = 0, male = 1) after adjustment for the family status.

Only significant results (P) are depicted. Positive regression coefficients for age indicate increased levels with increasing age, while negative coefficients indicate decreased levels with increasing age. For sex, a positive regression coefficient indicates higher levels for male participants than female participants, while a negative coefficient indicates lower levels for male participants.