Table 1. Characteristics of study samples by country and study site.

	N		Mean age		% Women		Mean annual familyincome per person (USD)		Family size
Site	DM	MC	DM	MC	DM	MC	DM	MC	DM	MC
CAMEROON
Yaoundé	497	499	56.14	55.16	52.11	51.90	3917	3067	6.79	5.58
MALI
Bamako	297	301	51.57	49.59	81.00	81.76	2625	2247	15.56	13.37
Sikasso	150	148	55.05	54.79	62.16	62.67	2647	2697	19.06	17.45
Tombouctou	50	49	50.45	50.68	75.51	76.00	2734	2508	6.67	6.20
TOTAL	497	496	52.50	51.27	74.85	75.40	2636	2356	15.73	13.88
TANZANIA
Temeke	485	474	51.82	50.46	57.73	58.23	1231	1137	5.48	5.12
SOUTH AFRICA
Mamelodi	301	301	61.02	60.52	80.07	80.07	2383	2564	4.95	4.84
ALL SITES	1780	1770	54.77	53.71	64.69	65.02	2570	2280	8.62	7.66

DM means persons with diagnosed diabetes mellitus. MC means matched control group, persons without known diabetes of the same sex and approximate age, living near to the case with DM with whom they were matched. Mean annual family income per person is the respondent’s self-reported family income divided by the self-reported number of persons in the respondent’s family (family size).