Table 2.

Medical, Functional, and Psychological Characteristics (N=350)

Characteristic	N	%
BFIa
None (BFI = 0)	149	42.6
Mild (BFI = 1–3)	142	40.6
Moderate/Severe (BFI ≥ 4)	59	16.8
Smoking status
Current smoker	20	5.7
Former smoker
Quit prior to surgery	229	65.4
Quit after surgery	46	13.2
Never smoker (< 100 lifetime cigarettes)	55	15.7
Pathological disease stage
IA	241	69.2
IB	107	30.8
Missing (n)	(2)
Time since surgical resection   (M = 3.5 years, SD = 1.2)
1 – < 2 years	38	10.9
2 – < 3 years	102	29.1
3 – < 4 years	92	26.3
4 – < 5 years	75	21.4
5 – < 6 years	43	12.3
Preoperative FEV1%b   (M = 88.7, SD = 20.4)
Severe (< 50%)	12	3.5
Moderate (50–69%)	53	15.6
Mild (≥ 70%)	276	80.9
Missing (n)	(9)
Preoperative diffusing capacity%c (M = 83.5, SD = 25.6)
Severe (< 50%)	18	5.7
Moderate (50–69%)	69	21.7
Mild (≥ 70%+)	231	72.6
Missing (n)	(32)
Type of surgical resection
Wedge	41	11.7
Segmentectomy	29	8.3
Lobectomy	265	75.7
Bilobectomy	9	2.6
Pneumonectomy	6	1.7
Video-assisted thoracic surgery only
Yes	64	18.3
No	285	81.7
Missing (n)	(1)
Presence of cardiac co-morbidity
Yes	145	41.5
No	204	58.5
Missing (n)	(1)
Pulmonary co-morbidities
COPDf	85	24.4
Asthma	21	6.0
Tuberculosis	1	0.3
None	242	69.3
Missing (n)	(1)
Current dyspnea (BDId ≤9)
No	136	40.1
Yes	203	59.9
Missing (n)	(11)
Self-Rated Karnofsky
Performance Status
100% (low impairment)	206	61.1
90%	72	21.4
80%	37	11.0
70%	13	3.9
60%	9	2.7
Missing (n)	(13)
Meeting physical activity guidelinese
Yes	84	24.0
No	266	76.0
Psychological distress
HADSg Depression (≥8)	31	8.9
HADS Anxiety (≥8)	69	19.7

^aBFI = Brief Fatigue Inventory

^bFEV1% =Forced Expiratory Volume in 1 second expressed as percent predicted

^cDLCO% = Diffusion Capacity expressed as percent predicted

^dBDI = Baseline Dyspnea Index

^eAmerican College of Sports Medicine and American Heart Association (≥150 min/week of moderate/strenuous activity)

^fChronic Obstructive Pulmonary Disease

^gHADS = Hospital Anxiety and Depression Scale