Table 1.

Prevalences (pooled results from duplicate Kato-Katz and one FLOTAC test), and Kato-Katz-derived infection intensities of A. lumbricoides, hookworm and T. trichiura among 268 schoolchildren from two schools in Yunnan province, P.R. China, stratified by school, sex and age.

	Obs.	A. lumbricoides			Hookworm			T. trichiura
		N	%	P-value	N	%	P-value	N	%	P-value
Total	268	125	46.6		160	59.7		134	50.0
School
Bulangshan	170	116	68.2	< 0.001	129	75.9	< 0.001	119	70.0	< 0.001
Pu'er	98	9	9.2		31	31.6		15	15.3
Sex
Female	123	49	39.8	0.040	63	51.2	0.009	52	42.3	0.020
Male	145	76	60.8		97	66.9		82	56.5
Age (years)
12-13	101	41	40.6	0.018	53	52.5	< 0.001	42	41.6	0.001
13-14	108	47	43.5		55	50.9		50	46.3
> 14	59	37	62.7		52	88.1		42	71.2
Infection intensitya
Bulangshan
Mean; 95% CI		6815	5069; 8563		600	367; 832		82	63; 120
No		72	42.4		55	32.4		52	30.6
Light		36	21.2		102	60.0		86	50.6
Moderate		58	34.1		7	4.1		30	17.6
Heavy		4	2.3		6	3.5		2	1.2
Pu'er
Mean; 95% CI		235	67; 537		175	74; 276		20	15; 33
No		90	91.8		71	72.5		83	84.7
Light		6	6.1		25	25.5		14.3	14
Moderate		2	2.1		2	2.0		1	1.0
Heavy		0	0		0	0		0	0

All P-values calculated using χ² or Fisher's exact test as appropriate. ^a Stratification according to WHO [21].