A moderated-mediation model of associations between attachment anxiety and avoidance, stress induced respiratory sinus arrhythmia, self-reported stress, and telomere length. Values represent standardized regression coefficients. Control variables (not pictured) include participant age, sex, ethnicity, body mass index, smoking history, and physical activity. Indirect effect of attachment anxiety on telomere through self-reported stress using 5,000 bootstrap samples length (− .04; 95% CI = − .08, − .01). Indirect effect of the interaction between attachment avoidance and stress-induced RSA on telomere length through self-reported stress using 5,000 bootstrap samples length (− .02; 95% CI = − .06, − .01). Tests of model fit: χ2 (4, N = 213) = 3.06, p = .55; comparative fit index = .99; root mean-square error of approximation = .00, 90% confidence interval = .00, .09. * p < .050. ** p < .001.