Emotional Intelligence can develop with purposeful effort, feedback from others and resources directed at the domain that can improve. Even if you are above 18 in all areas there is always an opportunity to grow. Consider this a wild card and you get to choose your area of focus.
The concept of emotional intelligence and an individual's emotional quotient (EQ) was first presented in 1990 by Salovey and Mayer and since that time more than 40 different tools to measure it have been developed. So, if you have taken prior measures or future measures of your EQ there may be subtle variations and even potentially additional dimensions considered. Irrespective they probably share similar findings of strength and opportunity. I personally have found that the 4 domains of self-awareness, self-management, social awareness, and social management are most foundational and perhaps simplest to convey and consider in any situation, medical, personal, professional or otherwise.