Table 2 Cluster analysis (ABCD groups) using the variables exacerbation number and mMRC
Cluster | Group A | Group B | Group C | Group D |
|---|---|---|---|---|
Number | 61 | 37 | 31 | 26 |
Cluster number | ||||
1 | 0* | 0 | 24 (65) | 13 (35) |
2 | 0 | 9 (41) | 0 | 13 (59) |
3 | 14 (33) | 28 (67) | 0 | 0 |
4 | 47 (87) | 0 | 7 (13) | 0 |
Variables used in clustering** | ||||
Exacerbations p/y | 0 [0–1] | 1 [0–1] | 2 [2–3] | 3 [3–3] |
mMRC dyspnoea score | 1 [0–1] | 2 [2–3] | 1 [0–1] | 3 [2–4] |
Other patient and disease characteristics | ||||
Male/ female % | 53/47 | 62/38 | 45/55 | 42/58 |
Age in years | 62 [54–68] | 66 [60–71] | 62 [55–67] | 61 [52–70] |
Smoked PY | 40 [21–50] | 40 [25–63] | 28 [19–50] | 33 [26–55] |
FEV1% pred | 62 [48–73] | 52 [43–65] | 63 [43–69] | 54 [30–70] |
GOLD stage % | ||||
1 | 15 | 11 | 23 | 12 |
2 | 59 | 50 | 52 | 44 |
3 | 26 | 33 | 22 | 20 |
4 | 0 | 6 | 3 | 24 |
BMI kg/m2 | 26 [21–30] | 31 [22–36] | 27 [24–29] | 24 [20–30] |
CCQ total score | 1.4 [0.8–2.5] | 2.7 [1.9–3.3] | 2.1 [1.6–2.7] | 3.2 [2.7–3.9] |
CAT | 13 [9–18] | 21 [16–24] | 18 [13–23] | 27 [21–28] |
BDI-PC total score | 1 [1–2] | 1 [1–4] | 1 [0–4] | 3 [2–6] |
BOD score | 1 [1–3] | 4 [3–5] | 2 [1–3] | 5 [4–7] |
Steps per day | 5261 [3863–8260] | 4042 [2466–5733] | 5743 [4473–6904] | 3936 [2226–5777] |
NCSI quality of life | 13 [7–21] | 20 [11–28] | 14 [6–28] | 32 [22–42] |
NCSI satisfaction relationship | 3 [2–4] | 3 [2–5] | 2 [2–4] | 5 [3–6] |
NCSI activities of daily living | 8 [3–17] | 22 [14–27] | 12 [5–24] | 28 [13–40] |
NCSI fatigue | 35 [28–41] | 42 [38–48] | 43 [35–49] | 44 [38–51] |