Table 3.

  Adjusted and unadjusted odds ratios for appropriate secondary prevention by duration of exposure to clinics

Component of secondary prevention	Years of clinic attendance	No (%)	Unadjusted odd ratios (95% CI)	P value*	Adjusted odds ratios† (95% CI)	P value*
Aspirin	None	165/238 (69)	1	<0.001	1	<0.001
	<1 year	200/250 (80)	1.77 (1.17 to 2.68)		2.06 (1.25 to 3.41)
	>1 to 3 years	237/275 (86)	2.76 (1.78 to 4.28)		2.75 (1.58 to 4.78)
	>3 years	144/171 (84)	2.35 (1.44 to 3.87)		2.56 (1.39 to 4.72)
Blood pressure management	None	281/309 (91)	1	0.021	1	0.008
	<1 year	275/298 (92)	1.19 (0.67 to 2.12)		1.31 (0.69 to 2.46)
	>1 to 3 years	287/304 (94)	1.68 (0.90 to 3.14)		2.12 (1.05 to 4.29)
	>3 years	179/187 (96)	2.23 (0.99 to 5.00)		2.70 (1.12 to 6.53)
Lipid management	None	122/309 (39)	1	<0.001	1	<0.001
	<1 year	129/298 (43)	1.17 (0.84 to 1.60)		1.28 (0.88 to 1.85)
	>1 to 3 years	219/304 (72)	3.95 (2.81 to 5.54)		4.29 (2.87 to 6.42)
	>3 years	139/187 (74)	4.44 (2.98 to 6.62)		4.41 (2.75 to 7.10)
Exercise	None	54/223 (24)	1	0.005	1	0.030
	Up to 1 year	71/240 (30)	1.31 (0.87 to 1.99)		1.34 (0.79 to 2.27)
	>1 to 3 years	86/255 (34)	1.59 (1.07 to 2.38)		1.66 (0.95 to 2.89)
	>3 years	59/163 (36)	1.77 (1.14 to 2.76)		1.89 (1.03 to 3.48)
Low fat diet	None	158/228 (69)	1	0.502	1	0.372
	Up to 1 year	161/239 (67)	0.91 (0.62 to 1.35)		0.75 (0.48 to 1.19)
	>1 to 3 years	195/267 (73)	1.20 (0.81 to 1.77)		0.95 (0.59 to 1.55)
	>3 years	117/167 (70)	1.04 (0.67 to 1.60)		0.71 (0.41 to 1.22)
Non-smoking	None	211/241 (88)	1	0.115	1	0.285
	Up to 1 year	202/250 (81)	0.59 (0.36 to 0.98)		0.55 (0.24 to 1.25)
	>1 to 3 years	250/279 (90)	1.23 (0.71 to 2.11)		1.67 (0.67 to 4.13)
	>3 years	155/172 (90)	1.30 (0.69 to 2.43)		1.27 (0.44 to 3.62)

^*P value is for trend. 

^†Adjusted for age, sex, baseline performance, and general practice.