Fig. 2

Healthy ageing index bifactor model graphical representation. HAI: Healthy Ageing Index; i1: household responsibilities difficulty; i2: walking a km difficulty; i3: washing whole body difficulty; i4: getting dressed difficulty; i5: carrying out work & everyday activities difficulty; i6: using the toilet difficulty; i7: time in seconds taken to walk 10 m; i8: making decisions difficulty; i9: handling money difficulty; i10: finding right word difficulty; i11: change in daily activities; i12: forgets where he/she is; i13: difficulty completing chores; i14: hearing problem; i15: eye problem; i16: sleep trouble or recent change in pattern; i17: feeling of not coping properly with everyday routine; i18: gets worn out or exhausted during daytime or evening; i19: learn test; i20: delayed recall; i21: long memory test; i22: immediate recall; i23: verbal fluency; i24: time orientation; i25: praxis-fold a piece of paper; i26: story recall difficulty; F1: factor 1; F2: factor 2; F3: factor 3; F4: factor 4