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Table 1 Study sample demographics and clinical outcomes

From: Self-reported exercise and longitudinal outcomes in cystic fibrosis: a retrospective cohort study

Mean ± S.D. [range]

Entire study sample

No exercise

Any exercise

Pvalue

n

1038

264

774

-

Sex (% male)

51.8

47.0

53.5

0.07

Race/Ethnicity (% non-white)

9.2

11.0

8.5

0.23

(n = 1036)

(n = 263)

(n = 773)

Age at Diagnosis (years)

2.5 ± 5.7

1.5 ± 4.7

2.8 ± 6.0

0.002

[0, 52]

[0, 51]

[0, 52]

(n = 1025)

(n = 259)

(n = 766)

CFTR Genotype (% F508del homozygotes)

45.2

46.4

44.7

0.64

(n = 1023)

(n = 263)

(n = 760)

Exocrine Pancreatic Function (% insufficient)

83.3

85.9

82.4

0.19

(n = 1017)

(n =256)

(n = 761)

Age at Ascertainment of Exercise Status (years)

13.8 ± 10.2

10.1 ± 11.1

15.0 ± 9.6

<0.001

[0.1, 61.3]

[0.1, 61.3]

[1.4, 57.8]

Wheezing Reported with Exercise (% yes)

23.4

22.0

23.9

0.54

(n = 995)

(n = 250)

(n = 745)

Baseline FEV 1 % Predicted

84.5 ± 22.5

78.0 ± 26.7

85.6 ± 21.5

0.001

[19.7, 145.8]

[19.7, 145.8]

[21.4, 137.6]

(n = 766)

(n = 115)

(n = 651)

Change in FEV 1 % Predicted/Year ††

-1.33 ± 4.65

-0.99 ± 5.48

-1.39 ± 4.47

0.44

[-26.4, 24.3]

[-26.4, 23.4]

[-23.2, 24.3]

(n = 558)

(n = 94)

(n = 464)

Baseline BMI Z-score

-0.15 ± 0.99

-0.12 ± 1.05

-0.16 ± 0.98

0.55

[-4.72, 3.12]

[-4.06, 3.12]

[-4.72, 2.50]

(n = 904)

(n = 207)

(n = 697)

Change in BMI Z-score/Year ††

-0.01 ± 0.20

0.02 ± 0.23

-0.01 ± 0.19

0.16

[-1.02, 0.83]

[-1.02, 0.70]

[-0.82, 0.83]

(n = 591)

(n = 134)

(n = 457)

  1. All FEV1 % predicted values were generated using U.S. CFF guidelines. All BMI Z-scores were generated using CDC percentiles. Baseline function represents the mean of all measurements obtained within 1 year before and after the age of exercise status ascertainment.
  2. ††Change in function represents the predicted change using linear regression and all measurements obtained 5 years after the age of exercise ascertainment for each subject. Only subjects with a minimum of 4 measurements and a minimum of 2 years of data were included.