Comparison of FECPAKG2, a modified Mini-FLOTAC technique and combined sedimentation and flotation for the coproscopic examination of helminth eggs in horses

Table 4 Inter-rater agreement between data obtained using Mini-FLOTAC and FECPAK^G2 to categorise strongyle egg shedding intensities

Category Mini-FLOTAC^a	Category FECPAK^G2b	Number^c	% category	% Correct % Incorrect	Cohen’s κ	Mean^d Median^d	Range^d
< 50	Matching	777	72.82	92.03 7.97	0.777	3.2 0	0–45
< 50	Higher	32	3.00			135.0 90	90–630
≥ 50	Lower	53	4.97			21.2 0	0–45
≥ 50	Matching	205	19.21			205.9 135	90–5175
- Error rate I (%)^e		53/258		20.5
- Error rate II (%)^f		60/215		27.9
< 100	Matching	828	77.60	91.94 8.06	0.731	6.7 0	0–90
< 100	Higher	33	3.09			205.9 135	135–630
≥ 100	Lower	53	4.97			50.1 45	0–90
≥ 100	Matching	153	14.34			714.4 405	135–5175
- Error rate I (%)^e		52/206		25.2
- Error rate II (%)^f		59/189		31.2
< 200	Matching	898	84.16	93.53 6.47	0.707	14.8 0	0–180
< 200	Higher	26	2.44			432.7 315	225–2340
≥ 200	Lower	43	4.03			94.2 90	0–180
≥ 200	Matching	100	9.37			957.2 630	225–5175
- Error rate I (%)^e		43/143		30.1
- Error rate II (%)^f		43/121		35.5

^aMini-FLOTAC data were used to categorise samples using three different thresholds (50, 100 and 200 epg)
^bSamples were counted depending on whether FECPAK^G2 placed the sample in the same category (matching) or in another (higher, lower)
^cNumber of samples out of N = 1067 in total
^dMean, median and range of the epg determined by FECPAK^G2 in the respective category
^ePercentage of samples classified as above the threshold by Mini-FLOTAC but below the threshold by FECPAK^G2
^fPercentage of samples classified as above the threshold by FECPAK^G2 but below the threshold by Mini-FLOTAC

ISSN: 1756-3305