A fall is usually caused by a complex interaction among the following: Intrinsic factors (age-related decline in function, disorders, and adverse drug effects) Extrinsic factors (environmental hazards) Situational factors (related to the activity being done, eg, rushing to the bathroom) Intrinsic factors Age-related changes can impair systems involved in maintaining balance and stability (eg, while standing, walking, or sitting) and increase the risk of falls.