Self-reported physical activity and lung function two months after cardiac surgery – a prospective cohort study

Table 4 Descriptive data for the whole sample, and comparison of sedentary and active patients

Variable	Whole sample (n = 283)	Sedentary or less active (n = 53)	Active (n = 230)	P-value
Sex (male/female)	231/52	39/14	192/38	0.09
Age (years)	67 ± 10	67 ± 9	67 ± 10	0.8
BMI (kg/m²)	27 ± 4.3	28.5 ± 5	26.8 ± 4	0.01*
Never smoked/ex-smoker/smoker (%)	44/51/5	38/58/4	46/50/4	0.5
EF (%)	54 ± 9	54 ± 9	54 ± 9	0.99
Length of anaesthesia (hours)	10 ± 4	10 ± 3	10 ± 4	0.15
Aortic occlusion (minutes)	79 ± 40	78 ± 41	79 ± 40	0.79
ECC (minutes)	112 ± 50	108 ± 47	113 ± 50	0.52
Length of surgery (hours)	4 ± 1	4 ± 1	4 ± 1	0.97

Sedentary or less active = patients who remained sedentary or decreased their level of activity, two months after surgery. Active = patients who remained active or increased their level of activity. BMI body mass index, EF preoperative ejection fraction, ECC extracorporeal circulation. P-value refers to the difference between sedentary and active patients, *indicates significant differences (p < 0.05).

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