The impact of waist circumference on function and physical activity in older adults: longitudinal observational data from the osteoarthritis initiative

Batsis, John A; Zbehlik, Alicia J; Barre, Laura K; Mackenzie, Todd A; Bartels, Stephen J

doi:10.1186/1475-2891-13-81

Table 4 Multivariable regression analysis of follow-up primary outcome measures (n = 2182)

From: The impact of waist circumference on function and physical activity in older adults: longitudinal observational data from the osteoarthritis initiative

		Waist	Circumference	Quartile
		Low WC	25-50% WC	50-75% WC	75%+
Short-Form 12 Score
Overall Score	OA +	100.1 [97.6-102.6]	101.2 [99.6-102.9]	100.4 [99.0-101.7]	99.9 [98.3-101.4]
	Δ	---	1.18	0.32	-0.19
	OA -	105.6 [104.4-106.9]	105.0 [103.3-106.7]	104.3 [102.6-105.9]	101.9 [99.7-104.0]
	Δ	---	-0.63	-1.37	-3.77 (p = 0.002)
Physical	OA +	47.0 [45.7-48.2]	46.2 [45.1-47.4]	45.1 [43.9-46.2]	44.5 [43.2-45.7]
	Δ	---	-0.71	-1.90 (p = 0.02)	-2.50 (p = 0.003)
	OA -	50.2 [49.0-51.4]	49.9 [48.4-51.3]	49.8 [48.6-51.0]	47.6 [45.9-49.3]
	Δ	---	-0.33	-0.38	-2.60
Mental	OA +	54.9 [53.9-55.9]	55.1 [54.0-56.2]	55.2 [54.2-56.3]	55.5 [54.5-56.5]
	Δ	---	0.16	0.33	0.57
	OA -	55.3 [54.3-56.4]	55.4 [54.4-56.5]	54.4 [53.2-55.5]	53.0 [51.4-54.6]
	Δ	---	0.09	-0.93	-2.21 (p = 0.015)
Physical Activity Scale for Elderly	OA +	128.2 [119.3-137.2]	121.0 [113.7-128.3]	128.5 [119.7-137.4]	107.8 [99.6-116.0]
	Δ	---	-7.3	0.31	-20.4 (p < 0.001)
	OA -	137.5 [128.1-146.9]	136.5 [125.1-147.9]	129.8 [117.7-141.9]	111.7 [99.6-123.8]
	Δ	---	-1.0	-7.7	-25.8 (p = 0.001)
Late-Life Disability Index
Frequency	OA +	55.7 [54.8-56.6]	55.4 [54.6-56.3]	55.1 [54.4-55.9]	54.9 [54.1-55.7]
	Δ	---	-0.28	-0.59	-0.84
	OA -	56.8 [55.9-57.7]	55.7 [54.6-56.8]	57.2 [55.9-58.4]	55.4 [54.1-56.8]
	Δ	---	-1.10	0.36	-1.38
Limitation	OA +	82.0 [79.9-84.2]	81.8 [79.7-83.9]	81.3 [79.4-83.1]	79.0 [76.9-81.0]
	Δ	---	-0.18	-2.37	-6.12 (p = 0.002)
	OA -	85.6 [83.6-87.7]	85.5 [82.9-88.0]	83.3 [80.8-85.8]	79.5 [76.2-82.9]
	Δ	---	-0.22	-0.79	-3.08 (p = 0.04)
Gait Speed	OA +	1.27 [1.24-1.30]	1.23 [1.20-1.26]	1.23 [1.21-1.25]	1.18 [1.15-1.21]
	Δ	---	-0.04 (p = 0.04)	-0.04 (p = 0.017)	-0.09 (p < 0.01)
	OA -	1.32 [1.29-1.34]	1.28 [1.25-1.31]	1.28 [1.24-1.31]	1.21 [1.17-1.25]
	Δ	---	-0.03	-0.036	-0.11 (p < 0.001)

Δ – represents the adjusted difference between each tertile of Waist Circumference (WC) and low WC.
Models were adjusted for age, sex, race, education, Charlson co-morbidity index, smoking status, and cohort type. Baseline scores were included where available.
Modified Charlson score consisted of the following variables: chronic obstructive pulmonary disease, ulcers, renal disorders, kidney transplant, rheumatoid arthritis, and cancer.

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ISSN: 1475-2891

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