In reference to Impact of dizziness and obesity of the prevalence of falls and fall-related injuries.

Lin and Bhattachryya analyzed National Health Interview Survey data, and showed that adults reporting dizziness were more likely to have fallen in the past year, and more likely to have been injured by falling. However, both falls and dizziness are more common in the elderly. Thus, it would seem essential to control for age in a study like this. A multivariate analysis could have determined whether dizziness is an independent predictor of falls and injuries after controlling for age. If so, it would be interesting to know whether there was an interaction between age and dizziness (for example, does dizziness confer increased risk across the age spectrum or only to the elderly). A stratified data presentation showing increased risk (if any) associated with dizziness for each of several age bands would be useful, as would some analysis of the role of sex as a risk factor for falls. If dizziness does not predict fall risk after age is accounted for, that would also be important information.