Table 1.

Baseline characteristics of the incident depression cohort

Characteristics	Incomplete follow-up (n = 537)		Completed follow-up (n = 857)		Statistics
	n	%	n	%	χ 2	df	P value
Age (years)
65–69	197	42.9	271	36.6	2.44	3	0.078
70–74	119	27.3	230	32.0
75–79	65	13.8	116	18.0
80+	156	16.1	240	13.4
Gender
Male	264	62.1	456	65.0	1.63	1	0.220
Female	273	37.9	401	35.0
Place of residence
Urban	140	26.9	207	23.1	1.30	2	0.286
Semi-urban	193	39.2	354	42.3
Rural	204	33.9	296	34.5
Formal education (years)
≥13	47	9.9	70	8.1	0.43	3	0.659
7–12	66	13.0	116	14.0
1–6	125	22.9	211	25.3
0	299	54.2	460	52.7
Economic status
High	37	8.7	95	15.0	5.15	2	0.017
Average	303	64.1	517	63.2
Low	197	27.2	245	21.8
Occupational attainment
Elementary	211	49.1	324	45.8	0.43	2	0.641
Trade	202	37.2	355	38.4
Semi-skilled/higher	56	13.8	100	15.8
Regular social contacts
Present	504	99.7	833	99.9	3.36	1	0.086
Absent	4	0.3	1	0.1
Regular social participation
Present	473	94.9	778	96.2	0.80	1	0.383
Absent	34	5.1	51	3.8
Self report of health status
Poor	32	4.9	54	6.2	0.98	1	0.338
Good	478	95.1	781	93.8
Sub-syndromal depression
Present	10	2.4	22	2.8	0.24	1	0.633
Absent	527	97.6	835	97.2
Functional disability
Absent	493	93.2	761	92.5	0.20	1	0.658
Present	44	6.8	96	7.6
Medical comorbidities
Absent	267	54.7	453	57.3	0.42	1	0.528
Present	219	45.3	362	42.7
Ever smoked
No	278	55.4	483	62.1	3.94	1	0.064
Yes	220	44.6	321	37.9
Ever drank
No	259	51.1	459	52.5	0.15	1	0.708
Yes	222	49.0	358	47.5
Weight
Normal weight	254	48.7	412	48.5	0.47	3	0.652
Under weight	47	8.8	78	6.9
Over weight	135	27.8	214	27.9
Obese	89	14.7	147	16.7
Levels of physical activity
Low	191	29.9	302	28.1	0.18	2	0.822
Moderate	239	48.4	408	50.2
High	107	21.7	147	21.7

All percentages are weighted according to study design