Table 3. Mean (95% CI) Cardiovascular Disease Risk Factors Of Men In Different Income Categories.

Risk factor (means and 95% confidence interval)	Total household income category (R/month)
	R0-100	R101-500	R501-1000	R1001-2000	R2001-3000	R3000+
Number (n)	101	194	159	111	40	50
Age (years)	35.1a	42.0abcde	37.3b	35.2c	33.9d	36.2e
	32.1−38.2	39.8−44.2	34.9−39.7	32.3−38.0	29.1−38.7	31.9−40.5
Serum lipids (mmol/l)
Total cholesterol	3.9a	3.9b	3.9c	3.9d	4.2	4.6abcd
	3.7−4.1	3.8−4.1	3.8−4.1	3.7−4.1	3.9−4.5	4.3−4.8
HDL cholesterol	1.2	1.2	1.2	1.3	1.2	1.1
	1.1−1.3	1.1−1.3	1.1−1.2	1.2−1.3	1.2−1.3	1.2−1.3
LDL cholesterol	2.3ab	2.3c	2.3d	2.3ef	2.6ae	3.0bcdf
	2.1−2.4	2.2−2.5	2.2−2.5	2.1−2.4	2.3−2.9	2.7−3.2
Triglycerides	1.1a	1.1b	1.3c	1.1	1.3	1.4abc
	1.0−1.3	1.0-1.2	1.1−1.4	1.0−1.3	1.0−1.5	1.2−1.7
Serum glucose (mmol/l)	5.0	4.9	4.8	4.8	4.8	4.6
	4.7−5.2	4.7−5.1	4.6−5.0	4.5−5.0	4.4−5.3	4.3−5.0
Plasma fibrinogen (g/l)	3.2	3.2	3.1	3.1	2.9	3.3
	2.9−3.4	3.0−3.3	2.9−3.2	2.9−3.3	2.6-3.2	3.0−3.6
Systolic blood pressure (mmHg)	127	127	127	126	126	127
	124−130	125−130	125−130	123−129	120−131	122−132
Diastolic blood pressure (mmHg)	74ab	78a	77	77	76	80b
	72−77	76−79	75−79	75−79	73−80	77−84
Body mass index (kg/m2)	19.9abcd	20.9ae	21.1bf	20.8g	22.1c	22.8defg
	19.2−20-6	20.4−21.4	20.5−21.6	20.1−21.5	20.9−23.2	21.8−23.8

^a,b,c,… Means with the same symbol differ significantly (p ≤ 0.05).