Table 2.

Metrics reflecting comparative average duration for eight common disorders of UK dogs with evidence for breed-related status

	Median annual duration				Episodes per case during study year					Episode duration					Median age at first diagnosis/disorder-related visit during study period
	Median % of year affected	Interquartile range (%)	Range (%)	n (dogs)	Median episodes	Interquartile range	Maximum	% cases with > 1 episode/year	n (dogs)	Median days/episode	Interquartile range (days)	Range (years)	% (n) cases affected all year	n episodes [dogs]	Age (years)	Interquartile range (years)	Range (years)	n (dogs)
Osteoarthritis	81.9	48.0–100	1.4–100	250	N/A (non-episodic)			N/A	250	N/A (non-episodic)			38.4 (96)	N/A	9.9	7.3–12.1	1.0–16.0	250
Dental disease	76.3	32.7–100	0.3–100	244	N/A (Data insufficient)			0	244	N/A (Data insufficient)			39.9 (97)	N/A	6.0	3.3–9.1	0.2–17.4	248
Overweight/obesity	69.6	31.4–100	0.3–100	247	N/A (Data insufficient)			0	247	N/A (Data insufficient)			30.0 (74)	N/A	5.2	3.0–7.8	0.2–14.5	249
Lipoma	54.5	23.2–99.6	0.3–100	243	N/A (Data insufficient)			0	243	N/A (Data insufficient)			25.1 (61)	N/A	9.3	7.5–11.3	1.3–17.9	245
Otitis Externa	3.8	N/A	0.8–65.8	76	1	1–1	4	12.4	250	14	8–23	3–60	0	79 [76]	5.1	2.2–8.8	0.2–15.4	250
Dermatitis	3.8	N/A	0.8–100	62	1	1–1	5	9.6	250	14	10–39	3–175	0	62 [59]	4.2	1.9–7.4	0.2–15.0	242
Anal Sac disorder	3.8	N/A	0.5–100	23	1	1–2	7	25.6	250	14	7–22	2–82	0	23 [20]	4.0	2.0–7.5	0.2–16.4	250
Conjunctivitis	2.2	N/A	0.5–100	46	1	1–1	3	7.2	249	8	5–14	2–365	1.2 (3)	46 [46]	4.0	1.3–8.0	0.1–15.6	248

Metric values are at disorder-level, based on analysis of group data obtained via structured review of electronic health records from 250 affected dogs per disorder during 2013. Disorders presented in descending order of median annual duration