Fig. 2

Adjusted models of interaction terms between unmet basic needs and age groups (N = 496). a Multivariate regression model: The effect of unmet basic needs on physical health summary score was steeper in the oldest group than the middle-aged group (F test = 4.72, p = 0.009, R² = 0.02). b Multivariate regression model: Mental health summary score was reduced by the effect of unmet basic needs, with the slope a bit steeper in the oldest group than in the middle-aged group (F test = 5.60, p = 0.004, R² = 0.02)