. 2014 Nov 19;9(11):e112965. doi: 10.1371/journal.pone.0112965

Table 2. Patient characteristics.

	Stable-state (n = 18)	Exacerbation (n = 30)	P-value
Mean age (years)	71.0	71.1	0.86
No. Male (%)	7 (39)	14 (47)	0.11
Mean FEV₁ % predicted	43.5	34.5	0.046^*
Mean FEV₁ L	1.1	0.79	0.0082^*
Mean FEV₁/FVC	0.44	0.48	0.30
Smoking status, n(%)
Ex-smoker	17 (94)	23 (77)	0.083
Current smoker	1 (6)	7 (23)	0.014^*
LTOT (%)	22	20	0.62
Mean pack-year smoking history	68.77	57.84	0.42
Mean body mass index	27.9	25.1	0.15
Mean no. reported exacerbations in past 12 months	2	3	0.57
Mean systolic BP	111	125	0.013^*
Mean diastolic BP	54	66	0.0049^*
Mean heart rate	78	92	0.0030^*
Pulse oximetry (%)	94	94	0.57

*Denotes statistical significance. No: number, LTOT: long-term oxygen therapy, BP: blood pressure.