Table 2.

Characteristics of 382 participants for whom chart abstraction was undertaken

Characteristic	COPD correctly diagnosed*n = 58	COPD undiagnosed†n = 49	COPD overdiagnosed‡n = 45	No COPD§n = 230
Age, yr, mean (SD)	64.2 (8.2)	65.0 (10.3)	65.5 (9.3)	62.6 (8.6)
Sex, male:female ratio	26:32	26:23	25:20	118:112
Current smoker	31 (53.4)	14 (28.6)	23 (51.1)	62 (27.0)
≥ 2 respiratory symptoms	43 (74.1)	19 (38.8)	22 (50.0)††	84 (36.5)
No. of visits to a primary care physician because of respiratory problem, rate per patient-year**	0.92	0.45	0.74	0.32
Underwent previous spirometry**	49 (84.5)	13 (26.5)	29 (64.4)	60 (26.1)
Had been prescribed any respiratory medication**	51 (87.9)	19 (38.8)	30 (66.7)	63 (27.4)

Note: COPD = chronic obstructive pulmonary disease, SD = standard deviation.

^*Positive spirometry result, diagnosis of COPD in chart.

^†Positive spirometry result, no diagnosis of COPD in chart.

^‡Negative spirometry result, diagnosis of COPD in chart.

^§Negative spirometry result, no diagnosis of COPD in chart.

^**Data extracted from charts.

^††Data available for n = 44.