Table 3.

Distribution and associations between epidemiological and operational factors among secondary case and non-secondary case from RACD

Variable	Non-secondary case (n = 1489)		Secondary case (n = 6)		P
	No.	(%)	No.	(%)
Socio-demographic
Age category (years)
≤15	481	99.8	1	0.2	0.151
16–30	362	98.9	4	1.1
31–45	356	99.7	1	0.3
46+	290	100	0	0.0
Gender
Female	836	100	0	0.0	0.007
Male	653	99.1	6	0.9
Education of household head
No school	40	100	0	0.0	0.450
Primary school	481	99.8	1	0.2
Secondary school	670	99.3	5	0.7
Tertiary school	298	100	0	0.0
Occupation category
Unemployed	281	100	0	0.0	0.010
Not forest-related job	847	99.9	1	0.1
Forest-related job	361	98.6	5	1.4
Wealth index ( quintile)
1st	295	99.7	1	0.3	0.796
2nd	306	99.7	1	0.3
3rd	302	99.3	2	0.7
4th	444	99.8	1	0.2
5th	142	99.3	1	0.7
Sub-district
Lembah Seulawah	525	99.4	3	0.6	0.917
Kuta Cot Glie	374	99.7	1	0.3
Lhoong	511	99.6	2	0.4
Indrapuri	79	100	0	0.0
Lhoknga	n/a	n/a	n/a	n/a
Clinical history
Reported fever in previous 2 weeks
No	1445	99.7	4	0.3	0.013
Yes	44	95.7	2	4.3
Prevention and behaviours
Travel
No	1340	99.8	3	0.2	0.016
Yes	149	98.0	3	2.0
Bed net ownership
No ITN	499	99.2	4	0.8	0.289
<1 ITN/2 people	712	99.7	2	0.3
≥1 ITN/2 people	278	100	0	0.0
Slept under bed net previous night
No	658	99.3	5	0.7	0.094
Yes	831	99.9	1	0.1
House spraying in previous 1 year
No	1381	99.6	6	0.4	0.493
Yes	108	100	0	0.0
Slept outside house last night
No	1459	99.6	6	0.4	0.725
Yes	30	100	0	0.0
Forest exposure and environment
Workplace near or in forest
No	1027	100	0	0.0	<0.0001
Yes, overnights not required	273	100	0	0.0
Yes, overnights required	189	96.9	6	3.1
Distance workplace to forest (n = 462)
In forest	209	97.2	6	2.8	0.085
<1 km	191	100	0	0.0
1–5 km	59	100	0	0.0
>5–10 km	3	100	0	0.0
Visited forest in the last month
No	1241	99.9	1	0.1	0.001
Yes	248	98.0	5	2.0
Main reason (n = 253)
Residence	108	99.1	1	0.9	0.430
Work	111	96.5	4	3.5
Other reason	29	100	0	0.0
Median visit (days), range (n = 253)	30 (1–30)	–	14 (4–30)	–	0.596
Season
Low transmission	734	99.7	2	0.3	0.688
High transmission	793	99.5	4	0.5
Reported living near water bodies
No	633	99.7	2	0.3	0.650
Yes	856	99.5	4	0.5
Reported living near or in forest
No	712	99.7	2	0.3	0.689
Yes	777	99.5	4	0.5
Housing quality
Good	831	99.6	3	0.4	0.858
Moderate	335	99.4	2	0.6
Poor	323	99.7	1	0.3
RACD and index case level factors
Distance from home of index case
At the same house	203	98.1	4	1.9	0.020
<100 m	926	99.8	2	0.2
100–499 m	319	100	0	0.0
≥500 m	41	100	0	0.0
Population coverage of RACD
<90 %	429	99.1	4	0.9	0.062
≥90 %	1060	99.8	2	0.2
Time from report of index case to RACD
At the same day	45	100	0	0.0	0.804
1–7 days	1388	99.6	6	0.4
>7 days	56	100	0	0.0
Age category of index case (years)
≤15	18	100	0	0.0	0.715
16–30	770	99.5	4	0.5
30–45	655	99.7	2	0.3
Gender of index case
Female	63	100	0	0.0	0.607
Male	1426	99.6	6	0.4
Occupation category of index case
Not forest-related job	393	99.5	2	0.5	0.658
Forest-related job	1096	99.6	4	0.4