Buddhism & Hinduism have common roots

Buddhism -

• Sufferings can be categorized into Physical, Mental and Karmic. ... coping with Karmic suffering is the unique part to Buddhism ... This category of suffering includes birth, sickness, old age and death (and rebirth).
   

Hinduism -

• Questioner: But are Hinduism and Buddhism opposed to each other?
  Tantra: No, not at all. Minus its plethora of anthropomorphic deities, the highest vision of Advita Vedanta or so-called Hindu Philosophy is precisely the vision of Buddhic Liberation. These are not two currents. Cultural influences have only made them appear so.

Islam -

• check the 1st link (How Do Muslims View the Elderly?) and 6th (Qur'an and Sunnah About the Elderly).
  from 1st:
  Institutional homes for the elderly are virtually unknown in the Muslim world. The strain of caring for one's parents during this most difficult time of their lives is considered an honor and a blessing.
  In Islam, serving one's parents is a duty second only to worshipping and it is the parents' right to expect it. It is considered despicable to express any irritation when, through no fault of their own, the old become difficult to handle.
  
  from 6th:
  
  ... senior citizens in most Muslim countries. There is a social structure, an extended family, in which an individual can spend the rest of his or her life surrounded by doting children and grandchildren, as well as peers they may have grown up with their whole lives.

Christianity -

• AGE DIVISIONS IN THE BIBLE
  The Bible indicates that there are three broad divisions of a lifetime.
  • youth: up to about 40
  • middle age: 40 - 60
  • Old age : 60+
• SOME PRINCIPLES OF OLD AGE -
  • Old age is a mental attitude as well as a physical problem. People shudder when you discuss old age. Next to the subject of death, it is the least favorite topic. There are many ways people try to postpone old age. They try various products to keep on looking and feeling young. They try traveling to relieve boredom and to give a sense of fulfillment. They use gadgets and programs to postpone old age.
• PROBLEMS OF OLD AGE
  • ... lack of mental sharpness.
  • ...a disorientation to life from the standpoint of success standard. ... great danger of disillusionment.
  • ... increase in mental attitude sins ... emphasis on criticism and judgment.
  • ... lack of security ... often the children's plans do not include them.
  • ... inability to concentrate... daydreaming, vegetating, saying nothing.
  • ... lack of motive to live, too much idle time, ... time for complaining ... lack of significant things to do.
  • ...future shock ... out of phase with the younger generations ... trend can get started toward hypercriticism.
  • ... may have stopped growing spiritually ... no occupation with Christ ... [apathy?]
  • ... becoming false accusers, gossips, evil speakers, vicious in criticism.
  • ... tendency ... to drink quite a lot when they don't have anything else going for them.
  • ... tendency to think that getting old means ... wisdom. So there is the garrulous senior citizen who never stops talking and inflicts continuous boredom ... with his platitudes and homely chatter.
  
   

Canada recognizes ageism as national problem
http://www.ohrc.on.ca/en_text/consultations/age-consultation-report_5.shtml
Negative Attitudes and Stereotypes
The consultation emphasized that many barriers faced by older persons are attitudinal. Much of what we associate with aging is simply ‘socially constructed’. In other words, it is not a real component of aging, but rather society’s response to the process.
 

Looks promissing (international clearning-house?): Administration on Aging

• especially, their international aging staticitics section.