Table 3.

Comparative sensitivity for individual tests

Individual test	CAPTURE (95% CI, p value)	CDQ (95% CI, p value)	C-SBQ (95% CI, p value)	COPD-SQ (95% CI, p value)	Peak flow (95% CI, p value)	Microspirometry (95% CI, p value)
CAPTURE		−3.3 (−9.6 to 2.9; 0.3245)	−11.4 (−16.9 to 5.9; <0.0001)	−3.6 (−9.6 to 2.5; 0.2615)	−15.6 (−22.1 to −9.1; <0.0001)	−13.2 (−20.2 to −6.2; 0.0002)
CDQ			−8.1 (−12.6 to −3.6; 0.0003)	−0.3 (−5.3 to 4.7; 1.0000)	−12.3 (−18.7 to −6.0; 0.0001)	−9.9 (−16.7 to −3.2; 0.0037)
C-SBQ				7.8 (3.2 to 12.4; 0.0007)	−4.2 (−10.4 to 2.0; 0.1978)	−1.8 (−8.4 to 4.8; 0.6427)
COPD-SQ					−12.0 (−18.3 to −5.7; 0.0002)	−9.6 (−16.4 to −2.8; 0.0052)
Peak flow						2.4 (−4.1 to 8.9; 0.5047)
Microspirometry

Values indicate the difference in sensitivity (with 95% CI and p values), comparing index tests in the column against index tests in the row. For example, sensitivity for CAPTURE is 3.3% lower than for CDQ (95% CI −9.6 to 2.9; 0.3245).

CAPTURE, COPD assessment in primary care to identify undiagnosed respiratory disease and exacerbation risk; CDQ, COPD Diagnostic Questionnaire; COPD, chronic obstructive pulmonary disease; C-SBQ, Chinese Symptom-Based Questionnaire.