Table 3.

Distribution of exacerbations and contacts within risk groups.

Characteristic	Risk factor
	A (n=11)	B (n=24)	C (n=13)	D (n=39)	Total (n=87)
Participant years, mean (SD)	0.77 (0.57)	1.12 (0.68)	1.16 (0.72)	0.94 (0.66)	1.00 (0.67)
Measurements per participant day, mean (SD)	0.28 (0.18)	0.43 (0.36)	0.35 (0.27)	0.57 (0.55)	0.45 (0.46)
Total number of exacerbations	11	70	23	150	254
Exacerbations/year, mean (SD)	1 (1.49)	2.92 (3.36)	1.77 (2.35)	3.87 (4.76)	2.93 (3.89)
Mild exacerbations	4	29	9	34	76
Mild exacerbation/year (SD)	1.11 (2.91)	1.07 (1.77)	0.52 (1.02)	1.06 (1.71)	0.99 (1.81)
Moderate exacerbations	2	11	7	37	57
Moderate exacerbation/year, mean (SD)	0.18 (0.45)	0.38 (0.97)	0.64 (1.84)	1.06 (1.96)	0.70 (1.61)
Severe exacerbations	5	30	7	79	121
Severe exacerbations/year, mean (SD)	0.28 (0.53)	1.74 (3.50)	0.37 (0.58)	1.85 (2.17)	1.39 (2.41)
Care notes	102	382	124	789	1397
Care notes/year, mean (SD), (n=84)	23.33 (29.06)	21.94 (23.90)	12.33 (11.78)	31.13 (33.55)	24.80 (28.52)
Treatment notes	53	364	166	1121	1704
Treatment notes/year, mean (SD)	5.29 (6.90)	14.20 (22.00)	14.85 (42.40)	29.01 (32.27)	20.28 (30.60)
Total contact notes/year mean (SD)	28.62 (33.41)	37.43 (34.75)	27.18 (50.18)	57.71 (44.74)	45.31 (45.41)