Table 3.

Association of prior breathlessness or wheeze symptom with diagnosis of IHD, COPD and asthma

			Case groups
	Controls (n=2368)	All cases (n=592)	IHD (n=194)	COPD (n=182)	Asthma (n=216)
Phase 1 (code alone)
n (%)
Without breathlessness or wheeze code	2227 (94)	414 (70)	155 (80)	111 (61)	148 (69)
With breathlessness or wheeze code	141 (6)	178 (30)	39 (20)	71 (39)	68 (31)
RRR (95% CI), age and gender adjusted
With vs without breathlessness or wheeze code	1.00	7.02 (5.48 to 9.00)	3.21 (2.15 to 4.79)	9.56 (6.74 to 13.60)	10.30 (7.17 to 14.90)
Phase 2 (code or textual information)
n (%)
Without breathlessness/wheeze code or text	1776 (75)	224 (38)	95 (49)	57 (31)	72 (33)
With breathlessness/wheeze code or text	592 (25)	368 (62)	99 (51)	125 (69)	144 (67)
RRR (95% CI), age and gender adjusted
With vs without breathlessness/wheeze code or text	1.00	5.14 (4.24 to 6.25)	2.78 (2.05 to 3.78)	6.32 (4.54 to 8.80)	7.86 (5.73 to 10.80)

COPD, chronic obstructive airways disease; IHD, ischaemic heart disease; RRR, relative risk ratios.