Table 1.

Characteristics of participants stratified by depressive symptoms at follow-up and the presence of a close social contact at baseline

Sample Characteristics	0 Close Contacts						p valuea	1–5 Close Contacts						p valuea
	PHQ-2 Positive N=69			PHQ-2 Negative N=316				PHQ-2 Positive N=686			PHQ-2 Negative N=4,572
	N	%	SE	N	%	SE		N	%	SE	N	%	SE
Age at Baseline, Years							0.171							0.006
65–69	13	17.1	5.2	58	25.5	2.8		120	25.7	1.7	932	30.3	0.6
70–74	12	23.1	6.8	70	26.1	3.5		134	23.5	1.7	1,011	25.9	0.6
75–79	13	23.2	6.1	68	21.0	2.3		144	19.7	1.5	933	18.9	0.6
80–84	10	13.5	4.4	67	16.0	2.4		147	17.0	1.5	885	13.8	0.5
85+	21	23.1	4.1	53	11.3	1.9		141	14.1	1.2	811	11.0	0.5
Gender, Female	33	50.9	6.5	155	45.9	3.3	0.506	426	59.2	2.4	2,662	56.5	0.9	0.299
Marital Status b							0.369							<0.001
Married or Living with Partner	19	34.1	6.8	112	38.6	3.0		307	50.3	2.3	2,451	60.5	0.8
Separated or Divorced	18	23.7	5.3	55	19.0	3.1		108	17.4	1.5	510	11.2	0.4
Widowed	28	37.8	6.3	114	30.8	2.9		241	28.4	1.7	1,469	25.4	0.7
Never Married	4	4.3	3.0	31	11.5	2.8		30	4.0	1.1	140	2.9	0.3
Race and Ethnicity c							0.011							<0.001
White, non-Hispanic	30	61.2	6.5	194	78.3	2.1		425	75.6	2.3	3,309	84.4	0.8
Black, non-Hispanic	27	21.3	4.2	95	12.8	1.2		179	10.8	1.1	895	7.1	0.4
Other	11	17.6	5.9	22	8.9	1.6		78	13.6	2.2	334	8.5	0.6
Education d							0.039							<0.001
Did Not Finish High School	32	42.5	6.9	89	24.3	2.4		247	30.5	2.3	1,013	17.3	0.9
High School Degree or Equivalent	20	27.8	6.0	81	27.4	2.9		187	28.5	2.4	1,239	26.8	0.9
Some College or Vocational Training	4	9.2	4.5	63	19.3	2.5		113	19.5	2.1	966	22.6	0.8
College Degree	13	20.4	7.0	78	29.0	2.2		134	21.5	1.8	1,323	33.3	1.4
Depression Screen Positive at Baseline, Yes e	22	32.2	6.5	45	11.7	1.8	<0.001	248	37.2	2.8	467	9.4	0.5	<0.001
Heart Attack at Baseline, Yes f	11	15.3	4.7	34	8.2	2.0	0.082	144	20.0	1.7	650	13.1	0.5	<0.001
Heart Attack at Follow-Up, Yes g	5	6.5	2.7	6	1.8	0.7	0.012	31	4.4	0.8	127	2.6	0.3	0.017
Stroke at Baseline, Yes h	11	16.2	4.3	36	9.7	2.0	0.085	123	16.7	1.4	421	7.8	0.5	<0.001
Stroke at Follow-Up, Yes i	7	6.8	2.5	6	1.5	0.7	0.006	40	5.8	0.9	98	1.8	0.2	<0.001
Heart Attack and/or Stroke at Baseline, Yes j	17	23.9	5.8	62	16.5	2.4	0.127	223	30.4	1.9	944	18.7	0.6	<0.001
Heart Attack and/or Stroke at Follow-Up, Yes k	12	13.3	3.3	11	3.1	1.0	<0.001	64	9.2	1.1	210	4.1	0.3	<0.001
Medical Conditions at Baseline l							0.008							<0.001
0–25 Percentile	17	23.1	6.1	116	44.3	3.1		145	22.1	2.0	1,396	33.2	0.7
25–50 Percentile	16	29.5	6.3	84	24.1	2.6		158	23.9	1.8	1,315	28.7	0.8
50–75 Percentile	18	23.6	5.0	67	19.7	2.0		169	23.4	1.9	1,061	22.0	0.6
75–100 Percentile	17	23.8	5.6	47	11.9	1.7		206	30.6	1.9	767	16.1	0.6
ADL Impairments at Baseline, Yes m	30	47.8	7.0	79	21.4	2.6	<0.001	325	50.0	2.0	1,208	24.4	0.7	<0.001

Notes: SE: standard error

^ap values determined by Rao-Scott F adjusted chi-square statistic.

There are missing data with the number of participants per social network grouping (without close and with close contacts, respectively) equaling:

^b381, 5256;

^c379, 5220;

^d380, 5222;

^e381, 5230;

^f385, 5254;

^g385, 5256;

^h385, 5252;

ⁱ385, 5253;

^j385, 5250;

^k385, 5251;

^l382, 5217;

^m368, 5025.