Knee extensor strength and body weight in adolescent men and the risk of knee osteoarthritis by middle age
Turkiewicz, Aleksandra LU ; Timpka, Simon LU
; Thorlund, Jonas Bloch
; Ageberg, Eva
LU
and Englund, Martin
LU
(2017)
In Annals of the Rheumatic Diseases
76(10).
p.1657-1661
- Abstract
OBJECTIVES: To assess the extent to which knee extensor strength and weight in adolescence are associated with knee osteoarthritis (OA) by middle age.
METHODS: We studied a cohort of 40 121 men who at age 18 years in 1969/1970 underwent mandatory conscription in Sweden. We retrieved data on isometric knee extensor strength, weight, height, smoking, alcohol consumption, parental education and adult occupation from Swedish registries. We identified participants diagnosed with knee OA or knee injury from 1987 to 2010 through the National Patient Register. We estimated the HR of knee OA using multivariable-adjusted Cox proportional regression model. To assess the influence of adult knee injury and occupation, we performed a formal... (More)
OBJECTIVES: To assess the extent to which knee extensor strength and weight in adolescence are associated with knee osteoarthritis (OA) by middle age.
METHODS: We studied a cohort of 40 121 men who at age 18 years in 1969/1970 underwent mandatory conscription in Sweden. We retrieved data on isometric knee extensor strength, weight, height, smoking, alcohol consumption, parental education and adult occupation from Swedish registries. We identified participants diagnosed with knee OA or knee injury from 1987 to 2010 through the National Patient Register. We estimated the HR of knee OA using multivariable-adjusted Cox proportional regression model. To assess the influence of adult knee injury and occupation, we performed a formal mediation analysis.
RESULTS: The mean (SD) knee extensor strength was 234 (47) Nm, the mean (SD) weight was 66 (9.3) kg. During 24 years (median) of follow-up starting at the age of 35 years, 2049 persons were diagnosed with knee OA. The adjusted HR (95% CI) of incident knee OA was 1.12 (1.06 to 1.18) for each SD of knee extensor strength and 1.18 (1.15 to 1.21) per 5 kg of body weight. Fifteen per cent of the increase in OA risk due to higher knee extensor strength could be attributed to knee injury and adult occupation.
CONCLUSION: Higher knee extensor strength in adolescent men was associated with increased risk of knee OA by middle age, challenging the current tenet of low muscle strength being a risk factor for OA. We confirmed higher weight to be a strong risk factor for knee OA.
(Less)
- author
- Turkiewicz, Aleksandra
LU
; Timpka, Simon
LU
; Thorlund, Jonas Bloch
; Ageberg, Eva
LU
and Englund, Martin
LU
- organization
- publishing date
- 2017-10-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- epidemiology, knee osteoarthritis, osteoarthritis
- in
- Annals of the Rheumatic Diseases
- volume
- 76
- issue
- 10
- pages
- 5 pages
- publisher
- BMJ Publishing Group
- external identifiers
-
- pmid:28487313
- wos:000410939600013
- scopus:85030612762
- ISSN
- 1468-2060
- DOI
- 10.1136/annrheumdis-2016-210888
- language
- English
- LU publication?
- yes
- id
- b2ddfbcf-879c-4cbe-8477-6cd9e84d0a7f
- date added to LUP
- 2017-11-07 09:59:57
- date last changed
- 2025-02-05 05:21:34
@article{b2ddfbcf-879c-4cbe-8477-6cd9e84d0a7f,
abstract = {{<p>OBJECTIVES: To assess the extent to which knee extensor strength and weight in adolescence are associated with knee osteoarthritis (OA) by middle age.</p><p>METHODS: We studied a cohort of 40 121 men who at age 18 years in 1969/1970 underwent mandatory conscription in Sweden. We retrieved data on isometric knee extensor strength, weight, height, smoking, alcohol consumption, parental education and adult occupation from Swedish registries. We identified participants diagnosed with knee OA or knee injury from 1987 to 2010 through the National Patient Register. We estimated the HR of knee OA using multivariable-adjusted Cox proportional regression model. To assess the influence of adult knee injury and occupation, we performed a formal mediation analysis.</p><p>RESULTS: The mean (SD) knee extensor strength was 234 (47) Nm, the mean (SD) weight was 66 (9.3) kg. During 24 years (median) of follow-up starting at the age of 35 years, 2049 persons were diagnosed with knee OA. The adjusted HR (95% CI) of incident knee OA was 1.12 (1.06 to 1.18) for each SD of knee extensor strength and 1.18 (1.15 to 1.21) per 5 kg of body weight. Fifteen per cent of the increase in OA risk due to higher knee extensor strength could be attributed to knee injury and adult occupation.</p><p>CONCLUSION: Higher knee extensor strength in adolescent men was associated with increased risk of knee OA by middle age, challenging the current tenet of low muscle strength being a risk factor for OA. We confirmed higher weight to be a strong risk factor for knee OA.</p>}},
author = {{Turkiewicz, Aleksandra and Timpka, Simon and Thorlund, Jonas Bloch and Ageberg, Eva and Englund, Martin}},
issn = {{1468-2060}},
keywords = {{epidemiology; knee osteoarthritis; osteoarthritis}},
language = {{eng}},
month = {{10}},
number = {{10}},
pages = {{1657--1661}},
publisher = {{BMJ Publishing Group}},
series = {{Annals of the Rheumatic Diseases}},
title = {{Knee extensor strength and body weight in adolescent men and the risk of knee osteoarthritis by middle age}},
url = {{http://dx.doi.org/10.1136/annrheumdis-2016-210888}},
doi = {{10.1136/annrheumdis-2016-210888}},
volume = {{76}},
year = {{2017}},
}