Table 2. Prevalence of individual helminth species amongst migrant workers according to nationality, employment sector, education, accommodation type and years of residence in Malaysia.

			Prevalence (%) ± 95% confidence limits
Factor	Level	n	Hookworms	A. lumbricoides	T. trichiura	H. nana
Nationality
	Indonesia	167	15.0 [9.44–22.47]	26.3 [19.08–34.84]	9.6 [5.39–16.16]	0 [0–3.13]
	Bangladesh	70	4.3 [1.28–11.81]	41.4 [30.42–53.04]	8.6 [3.80–17.41]	2.9 [0.61–9.70]
	Myanmar	23	17.4 [6.17–38.87]	17.4 [6.17–38.87]	26.1 [12.03–47.78]	0 [0–14.51]
	India	47	12.8 [4.59–28.56]	68.1 [50.41–82.43]	2.1 [0.12–14.67]	2.1 [0.12–14.67]
	Nepal	81	16.0 [8.44–27.22]	72.8 [60.60–82.71]	9.9 [4.44–19.94]	4.9 [1.47–13.63]
Employment Sector
	Construction	47	10.6 [3.35–26.30]	36.2 [21.28–53.89]	21.3 [10.16–38.82]	0 [0–10.60]
	Manufacturing	61	13.1[7.12–22.05]	72.1 [61.63–80.92]	4.9 [1.77–12.06]	4.9 [1.77–12.06]
	Plantation workers	71	14.1 [7.72–24.32]	25.4 [16.51–36.67]	15.5 [8.50–25.76]	2.8 [0.58–9.74]
	Food services	104	14.4 [10.01–20.09]	58.7 [51.54–65.54]	7.7 [4.65–12.40]	1.9 [0.64–5.11]
	Domestic services	105	12.4 [8.33–17.80]	26.7 [20.76–33.44]	4.8 [2.46–8.75]	0 [0–1.96]
Educational Level
	Primary only	166	10.8 [6.22–17.74]	36.1 [27.93–45.11]	12.0 [7.30–19.03]	1.2 [0.18–5.12]
	High school	160	13.1 [8.06–20.08]	53.8 [44.94–62.29]	5.6 [2.70–11.08]	2.5 [0.76–7.00]
	University	8	25.0 [4.64–63.53]	62.5 [28.93–88.88]	12.5 [0.64–50.00]	0 [0–36.46]
	No formal education	54	18.5 [11.72–27.77]	31.5 [22.64–41.77]	13.0 [7.16–21.22]	1.9 [0.30–7.26]
Accommodation
	Hostel/ Employer	272	14.0 [10.79–17.84]	49.6 [44.61–54.66]	11.4 [8.52–15.01]	2.6 [1.37–4.72]
	Own/rented house	116	11.2 [7.14–16.82]	28.4 [22.16–35.65]	5.2 [2.69–9.53]	0 [0–2.17]
Years of residence
	Less than 1 year	134	17.9 [12.49–24.87]	58.2 [50.20–65.93]	12.7 [8.15–18.91]	1.5 [0.36–5.03]
	More than 1 year	254	10.6 [7.92–14.03]	35.4 [30.90–40.21]	7.9 [5.60–10.96]	2.0 [0.98–3.88]