The Impact of Physical Activity on Disability Incidence among Older Adults in Mexico and the United States

Table 2

(a) Age-standardized prevalence of ADL limitations at baseline, by country

	United States	Mexico
	(unweighted 𝑁=13,224)	(unweighted 𝑁=11,064)
	(weighted 𝑁=49,603,001)	(weighted 𝑁=12,836,032)
	Standardized rate	Standardized rate
Percent reporting at least one ADL limitation	11.5%	10.6%∗
Percent reporting each ADL limitation:
Walking	5.2%	7.5%∗
Bathing	5.0%	5.3%∗
Eating	2.1%	3.0%∗
Transferring in/out of bed	4.6%	7.2%∗
Toileting	4.2%	5.2%∗
Total number of ADL limitations reported:
None	88.5%	89.4%∗
One	6.2%	3.2%∗
Two	2.7%	2.4%∗
Three	1.3%	1.7%∗
Four	0.7%	1.4%∗
Five	0.6%	1.9%∗

(b) Age-standardized prevalence of physical activity at baseline by country and functional limitations

	United States	Mexico
	(unweighted 𝑁=13,224)	(unweighted 𝑁=11,064)
	(weighted 𝑁=49,603,001)	(weighted 𝑁=12,836,032)
	Standardized rate	Standardized rate
Percent reporting physical activity	45.9%	28.6%∗
By number of functional limitations (at time 1)
0	43.9%	27.2%∗
1	1.3%	0.5%∗
2 or more ADL limitations	0.6%	0.5%∗

Notes: Age standardized using the weighted average of the two countries as the standard; population 51 years and older in the USA and 52 years and older in Mexico; weighted statistics using community-dwelling population only; ∗significant differences between countries at 𝑃=.01.