Table 3.

Demographics of the advanced elderly group

	Healthy controls		COPD
	Non-advanced elderly	Advanced elderly	Advanced elderly	Non-advanced elderly
n	17	26	41	54
Age (years)	73.71±4.87	83.38±2.59	83.29±2.77	72.48±4.41
Male/female	13/4	14/12	32/9	42/12
BMI (kg/m2)	23.89±2.97	24.25±3.85	23.66±3.80	24.10±3.77

Note: Data are expressed as numbers and mean ± standard deviation.

Abbreviation: BMI, body mass index.