Variable

Seropositive n = 100

Seronegative n = 516

Crude OR^a

95% CI^b

p value^c

Freq. (%)

Freq. (%)

Age

29.36 (6.83)

29.26 (7.22)

0.898

Marital status

Single/Widower

38 (37.6)

226 (43.9)

1

Married

63 (62.4)

289 (56.1)

0.75

(0.48, 1.16)

0.197

Income (RM)

1580.97 (964.07)

1506.52 (826.43)

0.423

Level of education

Primary

11 (11.0)

29 (5.6)

1

Lower secondary

17 (17.0)

138 (26.7)

0.33

(0.14, 0.77)

0.010

Upper secondary

69 (69.0)

331 (64.1)

0.55

(0.26, 1.15)

0.113

Tertiary

3 (3.0)

18 (3.5)

0.44

(0.11, 1.79)

0.251

Job category

Riflemen

89 (89.0)

460 (89.1)

0.99

(0.50, 2.0)

0.965

Non riflemen

11 (10.9)

56 (10.9)

1

Position

Non officer

87 (87.0)

61 (11.8)

1

Officer

13 (13.0)

455 (88.2)

1.12

(0.59, 2.12)

0.740

Duration of working (years)

10.65 (7.36)

11.67 (7.82)

0.229

Smoking status

Smoker

85 (85.0)

432 (83.7)

1

Never smoke

15 (15.0)

84 (16.3)

0.91

(0.50, 1.65)

0.750

Frequency of operation/training (year)

1.07

(0.85, 1.35)

0.577

Duration of latest operation (days)

0.99

(0.79, 0.99)

0.024

Duration of latest training (days)

1.00

(0.99, 1.01)

0.945

Wound during operation (n = 80)

Upper limb

5 (41.7)

27(39.7)

Lower limb

6 (50.0)

33 (48.5)

Other parts of the body

1 (8.3)

8 (11.8)

Hand washing with soap after activity (yes)

89 (89.0)

443 (85.9)

0.75

(0.38, 1.47)

0.403

Shower after work (yes)

97 (97.0)

489 (94.8)

0.56

(0.17, 1.88)

0.349

Contact with animals during operation (yes)

68 (13.2)

8 (8.0)

1.75

(0.81, 3.76)

0.154

Sighting rats/rodents at work site (yes)

58 (58.0)

289 (56.0)

0.92

(0.60, 1.42)

0.713

House location

Outside camp

48 (48.0)

210 (40.7)

1

Inside camp

52 (52.0)

306 (59.3)

0.74

(0.48, 1.14)

0.176