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Table 4 Comparison of decline in functional outcomes and in health status between groups with fast and slower decline in health status

From: Health status deterioration in subjects with mild to moderate airflow obstruction, a six years observational study

 

Fast decline

Slower decline

p

(n = 31)

(n = 152)

 

Lung function

 ∆ FEV1 (liter)

−0.04 [− 0.05 – − 0.02]

-0.02 [− 0.05–0.00]

0.09

 ∆ FRC (liter)

0.027 [− 0.047–0.086]

0.009 [−0.036–0.064]

0.74

 ∆ TL,CO (ml/min/kPa)

− 0.047 [− 0.220 – − 0.010]

−0.067 [− 0.173–0.010]

0.74

Physical fitness

 ∆ BMI (kg/m2)

0.06 [− 0.10–0.26]

0.09 [− 0.06–0.24]

0.88

 ∆ FFM (% body weight)

−0.49 [− 0.77 – − 0.17]

−0.22 [− 0.45–0.03]

0.02

 ∆ Handgrip (kg)

−0.49 [− 1.29 – − 0.11]

−0.33 [− 0.83–0.21]

0.08

 ∆ Quadriceps force (Nm)

−3.83 [− 6.07 – − 1.92]

−3.20 [− 6.56 – − 0.57]

0.61

 ∆ 6MWD (meter)

−7.27 [− 13.02 – − 1.00]

− 2.12 [− 6.94–3.26]

< 0.01

 ∆ VO2peak (l/min)

−0.06 [− 0.10 – − 0.02]

−0.075 [− 0.13 – − 0.03]

0.50

 ∆ OUES (slope)

− 45 [− 103–7]

− 57 [− 116 – − 2]

0.58

Physical activity

 ∆ Steps/day

− 222 [− 591 – − 66]

− 268 [− 525–92]

0.72

 ∆ MVPA (minutes)

−2.72 [− 6.50–3.92]

−1.38 [− 7.86–4.21]

0.89

Emotional state

 ∆ HADS anxiety (score)

0.32 [−0.03–0.56]

−0.08 [− 0.33–0.13]

< 0.0001

 ∆ HADS depression (score)

0.28 [0.00–0.81]

0.00 [− 0.17–0.16]

< 0.001

Health status

 ∆ SF36 PCS (sum score)

−3.02 [− 5.13 – − 2.13]

0.02 [− 0.89–0.59]

< 0.0001

 ∆ SF36 MCS (sum score)

−2.38 [− 4.88 – − 0.95]

0.14 [− 0.47–0.76]

< 0.0001

 ∆ EQ-5D VAS (score)

−2.49 [− 4.57 – − 1.18]

0 [− 0.73–0.84]

< 0.0001

 ∆ CCQ (total score)

0.100 [0.050–0.177]

0.007 [− 0.020–0.039]

< 0.0001

  1. Data are expressed as median [interquartile range]. FEV1 = forced expiratory volume in one second, FRC = Functional residual capacity, TLCO = diffusion capacity for carbon monoxide, BMI = body mass index, FFM = fat free mass, 6MWD = six minutes walking distance, MVPA = time spent in moderate to vigorous physical activity, HADS = Hospital Anxiety and Depression Scale. Missing values: Fast decline – FEV1, FRC, TL,CO, handgrip force, 6MWD and HADS n = 1, FFM index n = 8, quadriceps force n = 2, VO2peak and OUES n = 3. Slower decline – FFM index n = 18, 6MWD, EQ-5D, CCQ n = 1, VO2peak, OUES and CCQ n = 7, physical activity n = 11