The average life expectancy index varies accordingly in different nations. This variation is, owing to the standardized parameters of living amenities provided by each nation to its citizens. As the living standard of developed/ developing and under developed country varying, likewise the the average life expectancy fluctuates. As often, life expectancy in developed nations is higher than the citizens of developing nations. The same situation, regard the life expectancy is between developing and under developed nations.

There are so many factors that influence the average life expectancy. But, among them, significant are high nutritional value added with quality hygienic awareness. Added with, proper quality medical services provided to people. For example, in United Kingdom average life expectancy is 81.20 years, in Canada 82 years and in USA 78.79 years.These data were reported in the year of 2019. During the two years span of Covid-19 pandemic in USA, it decreased by 2% to 77 years but in the year 2021 again it reached to 79 years.
Some amazing facts
Amongst these, there are some amazing data. As far as, the longest life expectancy in the World was recorded in Asiatic countries i.e. Japan by 85 years. Macau 85 years and Hong Kong topped the list by 85.29 years. Hong Kong and Macau are now part of the China main land. After these, come the number of UK, Canada and USA. In the lowest life expectancy index, there are 5 top nations. Four of them belong to African continent i.e, Swaziland, Gaibon, Guinea- bison and Chad. The fifth and last nation is Asian, that is Afghanistan. In African nations the main causes are poverty, improper health services and spread of HIV/AIDS etc. Whilst in Afghanistan,poor hygiene condition, inefficient medical services and its being involved continuously in War fare are main reasons.
Women often outlive men
Some interesting facts revealed in researches whole through the World are worth mentioning. Interestingly, women outlive men in developed nation by a margin of at least 7-8 years. On the same line, this margin in developing countries is 3 to 4 years. Amazingly in Russia, women outlive men by a margin of average 13 years.
In research, it came up that estrogen hormone plays significant role in increasing the life expectancy of women. This hormone is mainly secreted by ovary, and in minimal by adrenal gland. The estrogen hormone is helpful in controlling the bad cholesterol. Hence, women to lesser degrees are subject to the cardiac problems than men. Again, an significant fact to be noticed is, generally women contain 8% excessive fat contents than men. But, the ample secretion of estrogen hormone from ovary helps controlling the bad cholesterol.
Though women outlive men, but simultaneously ageing process initiates earlier and faster in women than men. This phenomenon, makth women look much older in appearance than men of the same age group.The reason behind this phenomenon is, the presence of collagen protein that remains present in compact form over the skin of men. This collagen protein constitutes about 35% share of the total protein present in the human body. The same collagen is responsible for the elasticity of the skin, hardness of the bone-joints and formation of cartilage. The cartilage is the main constituent of supporting structure of nose, ears and ribs.
Some significant factors
In counting the average life expectancy, some factors are noticeable-
A- Happiness index plays a positive role to enhance the life expectancy, (it’s but natural, stress is harmful to the health.)
B- Married people often out live single persons.
C- Women are subject to earlier process of ageing.
D- Veg diet based people have got more life expectancy than non vegetarians.
E- Short heighted people have got more life expectancy. Since they are not prone to digestive ailment. Penned by– Vinay Pharasi…..