Comparison of life quality in the DPN group before and after comprehensive nursing intervention. (A) The quality of life indexes (PF, RP, RE, GH) of patients in the DPN group were significantly higher than these indexes before intervention (t=7.829, t=4.018, t=3.028, t=6.048; P<0.001, P=0.001, P=0.015, P<0.001). (B) The quality of life indexes (SF, MH, BP, VT) after intervention were higher than those before the intervention (t=4.258, t=2.856, t=4.233, t=6.278; P=0.001, P=0.023, P=0.001, P<0.001). *P<0.05 and ***P<0.001. PF, physiological function; RP, role-physical; RE, role-emotional; GH, general health; SF, social function; MH, mental health; BP, bodily pain; VT, vitality.