Increases in the completeness of disease records in dairy databases following changes in the criteria determining whether a record counts as correct

Table 3 Completeness (Com) and adjusted completeness (Com adj) with exact 95% confidence intervals (CI) were calculated for farmer-recorded data where a veterinarian attended the case compared with database recordings from four Nordic countries over two 2-month periods in 2008

	Match²	Denmark	Finland	Norway	Sweden
Com (95% CI)	B	0.74 (0.68;0.79)	0.39 (0.30;0.49)	0.47 (0.34;0.60)	0.21 (0.15;0.28)
Com adj (95% CI)	B	0.88 (0.82;0.92)	0.56 (0.47;0.63)	0.60 (0.48;0.71)	0.33 (0.26;0.40)
Com (95% CI)	C	0.75 (0.69;0.80)	0.39 (0.30;0.49)	0.51 (0.38;0.64)	0.21 (0.15;0.29)
Com adj (95% CI)	C	0.88 (0.83;0.92)	0.56 (0.47;0.63)	0.63 (0.51;0.73)	0.33 (0.26;0.41)

The completeness figures were calculated when allowing a locomotor complex¹ match and a date discrepancy of ±7 (B) days and ±30 days (C).
¹ The locomotor complex contains five locomotor categories: arthritis, laminitis, dermatitis, hoof abscess/sole ulcer, and lameness other.
² Exact match between ND and FD (Match A). Com were 0.37, 0.27, 0.34 and 0.17 and Com adj were 0.64, 0.43, 0.43 and 0.26 in Denmark, Finland, Norway and Sweden, respectively [7].

ISSN: 1751-0147