Table 1

Sample characteristics—National Knowledge, Attitudes and Practices Survey, Sierra Leone, July 2015 (n=3564)

	Respondents N* (%†)	Anxiety and depression (PHQ-4)							PTSD (IES-r)
		No symptom (N*=1982, 51.4%†)			Any symptom/s (N*=1582, 48.6%†)			P value‡	No symptom (N=880, 23.6%†)			Any symptom/s (N=2684; 76.4%†)			P value‡
		N*			N*			P value‡	N*			N*			P value‡
Gender								0.534							0.076
Male	1774 (49%)	983	48	45.9–50.5	791	49	47–51.7		425	46	42.7–49.5	1349	50	47.7–51.5
Female	1790 (51%)	999	52	49.5–54.1	791	51	48.4–53.1		455	54	50.5–57.3	1335	50	48.5–52.3
Age								0.020							0.251
15–24 years	1203 (35%)	710	37	34.5–38.9	493	33	30.8–35.2		310	37	33.2–39.8	893	34	32.6–36.2
≥25 years	2360 (65%)	1272	63	61.1–65.5	1089	67	64.8–69.2		570	64	60.2–66.8	1791	66	63.8–67.4
Education§								0.857							0.111
None	1424 (37%)	807	37	34.8–39.2	617	36	34.1–38.6		351	37	33.9–40.5	1073	37	34.7–38.3
Primary	739 (21%)	402	20	18.5–22.1	337	21	19.1–22.9		169	18	15.5–20.7	570	21	19.9–22.9
≥Secondary	1394 (43%)	768	43	40.4–45	626	43	40.4–4 5		358	45	41.2–48	1036	42	40.2–44
Region								<0.001							<0.001
West	798 (21%)	515	26	23.7–27.7	283	15	13.5–16.8		290	32	28.5–34.7	508	17	15.7–18.5
North	1740 (34%)	1006	36	34–38.4	734	32	29.8–34.1		383	30	27.3–33.5	1357	35	33.4–37
East	471 (23%)	196	17	15.4–18.8	275	29	26.6–30.8		86	16	13.8–18.8	385	25	23.1–26.3
South	555 (23%)	265	21	19.1–22.9	290	24	22.3–26.3		121	22	18.9–24.5	434	23	21.3–24.5
Know someone who died from Ebola								<0.001							<0.001
Yes	1068 (31%)	478	25	22.5–26.5	510	34	31.6–36.0		171	19	16.5–21.9	817	32	30.2–33.8
No	2476 (68%)	1438	72	70.0–74.2	1038	64	61.9–66.5		673	77	73.7–79.5	1803	66	63.9–67.5
Know someone quarantined for Ebola								<0.001							<0.001
Yes	1165 (34%)	542	27	24.9–28.9	598	41	38.3–42.9		207	22	19.3–24.9	933	37	35.3–38.9
No	2378 (65%)	1407	72	69.4–73.6	971	59	56.4–61.0		658	77	73.6–79.4	1720	62	60.0–63.6
Composite Ebola experience: Know someone who died from Ebola and know someone quarantined for Ebola
None	2168 (59%)	1295	68	65.5–9.7	873	54	51.6–56.4	<0.001	611	73	70.4–76.4	1557	57	55.2–59.0	<0.001
Only know someone died from Ebola	199 (6%)	84	6	4.5–6.5	80	5	4.3–6.5		32	5	3.1–5.9	132	6	4.8–6.6
Only know someone quarantined for Ebola	296 (9%)	128	7	5.7–8.1	159	12	10.0–13.0		59	7	5.0–8.4	228	10	8.8–11.0
Both experience	869 (25%)	392	20	18.3–21.9	428	29	27.0–31.2		137	15	13.0–17.8	683	27	25.6–29.0
Ebola is no longer a threat in Sierra Leone								<0.001							<0.001
Agree	966 (30%)	589	35	32.3–36.7	377	25	23.2–27.4		289	38	34.6–41.2	677	28	25.9–29.3
Disagree	2534 (69%)	1355	63	60.9–65.3	1179	73	70.7–74.9		558	58	54.2–60.8	1976	71	69.3–72.7
Ebola is no longer a threat in your district								0.005							<0.001
Agree	1188 (40%)	676	42	39.5–44.1	512	37	34.8–39.4		337	47	43.2–50	851	37	35.6–39.2
Disagree	2309 (58%)	1264	56	53.4–58	1045	61	58.7–63.3		509	49	45.4–52.2	1800	61	59.4–63
Ebola is no longer a threat in your community								0.007							<0.001
Agree	1451 (45%)	821	48	45.2–49.8	630	43	40.6–45.2		410	52	48.7–55.5	1041	43	41.3–45.1
Disagree	2062 (53%)	1129	51	48.4–53	933	56	53.4–58		443	44	40.9–47.7	1619	56	54–57.8
Ebola is no longer a threat in your household								0.007							<0.001
Agree	1543 (48%)	864	50	47.4–52.0	679	45	43.0–47.6		421	53	49.5–56.3	1122	46	44–47.8
Disagree	1981 (51%)	1092	49	46.5–51.1	889	54	51.3–56.1		439	44	40.8–47.6	1542	53	51.4–55.2
Composite threat perception: Ebola is no longer a threat at any level								<0.001							<0.001
Agree	814 (26%)	514	31	28.5–32.7	300	21	19.0–22.8		266	35	32.1–38.5	548	23	21.4–24.6
Disagree	2691 (72%)	1433	67	65.2–69.4	1258	77	75.3–79.3		584	61	57.3–63.9	2107	76	74.2–77.4

*Frequencies are numbers without adjusting for sampling fractions.
†Percentages adjusted to take account of sampling fractions.
‡Pearson’s χ² test, not taking missing value as categories.
§System missing values not presented; we excluded ’don’t know' responses and missing values .
IES-r, Impact of Event Scale-revised; PHQ, Patient Health Questionnaire; PTSD, post-traumatic stress disorder.