. 2016 Oct 13;6(3):241–250. doi: 10.1016/j.ijpddr.2016.10.004

Table 4.

Coverage probabilities and uncertainty of 95% confidence intervals (CI) provided by the WAAVP, eggCounts (paired and unpaired model) and Bayescount (standard paired model) procedures with datasets of simulated FECR = 85% or 97% and with varying group sizes (n) and total post-treatment aggregation estimate (k). Results are presented as the percentage of iterations in which the simulated FECR% was correctly included within the 95% CI provided by the procedure. A total of 500 iterations were performed for each combination of true FECR% and k. See text for further details on the simulated parameters.

		Coverage 95% CI				Uncertainty 95% CI
FECR% = 85%		WAAVP^a	eggCounts^b		Bayescount^c	WAAVP^a	eggCounts^b		Bayescount^c
n	k		paired	unpaired			paired	unpaired
10	0.1	82	23	80	95	65	8	45	74
	0.3	95	40	96	99	49	9	45	51
	0.8	98	63	99	100	34	9	36	32
20	0.1	88	26	82	97	45	6	34	60
	0.3	94	39	94	95	31	6	27	30
	0.8	100	64	99	99	23	6	22	17
30	0.1	90	22	84	96	40	5	29	50
	0.3	96	44	95	95	25	5	21	20
	0.8	100	67	100	99	18	5	17	13
40	0.1	91	22	81	97	34	4	23	40
	0.3	97	39	94	96	22	4	18	17
	0.8	100	64	99	97	16	4	15	10
		Coverage 95% CI				Uncertainty 95% CI
FECR% = 97%		WAAVP^a	eggCounts^b		Bayescount^c	WAAVP^a	eggCounts^b		Bayescount^c
n	k		paired	unpaired			paired	unpaired
10	0.1	84	49	85	99	15	4	14	68
	0.3	93	67	93	100	10	4	11	38
	0.8	98	85	99	100	9	4	10	18
20	0.1	87	46	79	97	11	3	7	43
	0.3	96	74	96	99	7	3	6	11
	0.8	98	83	99	99	5	3	5	5
30	0.1	89	43	78	95	8	2	5	25
	0.3	96	68	94	97	5	2	4	6
	0.8	99	83	99	98	4	2	4	4
40	0.1	90	44	76	95	7	2	4	15
	0.3	97	70	94	95	5	2	4	4
	0.8	98	82	98	97	4	2	3	3

Coles et al. (1992).

Torgerson et al. (2014).

Geurden et al. (2015); FECR% = Simulated faecal egg count reduction; n = simulated group size; k = simulated total post-treatment FEC aggregation estimate.