Which type of social activities may reduce cognitive decline in the elderly?: a longitudinal population-based study.
BACKGROUND
Previous studies have found that social activities are beneficial for the reduction of cognitive decline (CD) in the elderly. However, knowledge regarding the types of social activities that reduce CD in later life is limited. The aim of this study is to examine which type of social activities reduce CD 4 years later among young-old (Y-O) and old-old (O-O) adults.


METHODS
We conducted a secondary analysis using data from cognitively intact adults 65 years of age or older who participated in the Korean Longitudinal Study of Aging (KLoSA). Cognitive function was assessed using the Korean version of the Mini-Mental State Examination (MMSE). We computed CD between 2008 and 2012 by subtracting the Wave 4 MMSE score from the Wave 2 MMSE score. Multivariate linear regression analysis was conducted regarding the effects of social activities on CD after adjusting for age, sex, education, income, marital status, activities of daily living (ADL), instrumental activities of daily living (IADL), chronic diseases, quality of life, depressive symptom, change in depressive symptom, and cognitive functioning at baseline.


RESULTS
Subjects who participated in senior citizen clubs or senior centers at baseline had a lower risk of CD 4 years later than those who did not in Y-O adults. Frequent contact with offspring by phone or letters was associated with reduced CD in O-O adults. Frequent face-to-face contact with offspring was positively associated with CD in O-O adults. Participating in two or more formal social activities was associated with reduced CD compared with nonparticipation in O-O adults.


CONCLUSIONS
Encouraging older adults to participate in senior citizen clubs or to have frequent contacts with adult children by phone or letters may help reduce CD in later life among older adults. Participation in a variety of formal social activities may also have a beneficial effect on preventing CD in older adults.
Department of Nursing, University of Ulsan, Ulsan, Republic of Korea.
Seung Hee
SH
Lee
Hallym University Institute of Aging, Chuncheon, Republic of Korea. twoponej@gmail.com.
Young Bum
http://orcid.org/0000-0003-4882-8678
YB
Kim
Cognitive impairment; Elderly; Korea; Social activity
Lancet. 2000 Apr 15;355(9212):1315-9
10776744
Gerontologist. 1975 Jun;15(3):202-5
1140576
Am J Epidemiol. 2002 Jun 15;155(12):1081-7
12048221
Arch Neurol. 2003 Mar;60(3):359-65
12633147
J Gerontol B Psychol Sci Soc Sci. 2003 Mar;58(2):S93-S100
12646598
Eur J Neurosci. 2003 May;17(10):2042-6
12786970
Lancet Neurol. 2004 Jun;3(6):343-53
15157849
J Gerontol B Psychol Sci Soc Sci. 2004 Nov;59(6):P278-84
15576855
Int J Epidemiol. 2005 Aug;34(4):864-71
15764689
Lancet Neurol. 2006 May;5(5):406-12
16632311
J Am Geriatr Soc. 2006 Jul;54(7):1108-13
16866683
JAMA. 2006 Nov 8;296(18):2280
17090776
Int Psychogeriatr. 2007 Dec;19(6):1110-24
17433120
Arch Gerontol Geriatr. 2008 Nov-Dec;47(3):302-10
17936377
BMC Geriatr. 2009 Jul 28;9:33
19638207
Soc Sci Med. 2009 Dec;69(11):1608-15
19819601
Arch Gerontol Geriatr. 2010 Feb;50 Suppl 1:S53-7
20171458
Arch Gerontol Geriatr. 2011 Jul-Aug;53(1):24-30
20598380
Int J Geriatr Psychiatry. 2011 Jan;26(1):65-74
21157851
J Gerontol A Biol Sci Med Sci. 2011 Apr;66(4):467-73
21300745
Int J Geriatr Psychiatry. 2011 Dec;26(12):1260-6
21351152
Behav Neurol. 2010;23(4):165-7
21422545
Arch Gerontol Geriatr. 2012 Jan-Feb;54(1):185-91
21546098
Int Psychogeriatr. 2011 Nov;23(9):1405-12
21777501
Int J Geriatr Psychiatry. 2012 Jul;27(7):755-62
21919059
J Int Neuropsychol Soc. 2011 Nov;17(6):998-1005
22040898
PLoS One. 2012;7(7):e40793
22829885
Neuropsychol Dev Cogn B Aging Neuropsychol Cogn. 2013;20(3):320-38
22873285
Aging Clin Exp Res. 2013 Apr;25(1):89-97
23740638
J Gerontol B Psychol Sci Soc Sci. 2013 Nov;68(6):963-73
24150177
J Neural Transm (Vienna). 2015 Aug;122 Suppl 1:S55-61
24390152
Exp Aging Res. 2014;40(1):40-59
24467699
J Geriatr Psychiatry Neurol. 2014 Jun;27(2):94-102
24584465
PLoS One. 2014 Jun 12;9(6):e99638
24923270
Int Psychogeriatr. 2015 Apr;27(4):601-9
25369763
Evid Based Ment Health. 2015 May;18(2):50
25743450
Iran J Public Health. 2014 Jul;43(7):903-12
25909058
J Cross Cult Gerontol. 2015 Sep;30(3):333-52
25935206
PLoS One. 2015 May 14;10(5):e0126471
25974069
Health Qual Life Outcomes. 2015 Sep 11;13:140
26361977
J Alzheimers Dis. 2015;47(2):479-86
26401569
Geriatr Gerontol Int. 2016 Dec;16(12):1281-1288
26493051
BMC Public Health. 2015 Oct 24;15:1089
26499254
J Affect Disord. 2016 Jan 15;190:235-240
26521086
Int J Geriatr Psychiatry. 2016 Aug;31(8):912-9
26833847
Community Ment Health J. 2016 May;52(4):493-8
26993652
Occup Environ Med. 2016 Jul;73(7):487-96
27178844
J Gerontol B Psychol Sci Soc Sci. 2018 Jun 14;73(5):799-806
27194753
Eur J Ageing. 2005 Mar;2(1):31-39
28794714
Eur J Ageing. 2008 Feb 13;5(1):31-45
28798560
Ann Neurol. 1988 Feb;23(2):138-44
2897823
J Gerontol. 1972 Oct;27(4):511-23
5075497
Neurology. 1998 Sep;51(3):728-33
9748017