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Table 1 Characteristics of study population (n = 50)

From: Forearm bone mineral density in adult men after spinal cord injuries: impact of physical activity level, smoking status, body composition, and muscle strength

 

Active men after SCI- Wheelchair rugby players (n = 25)

Inactive men after SCI (n = 25)

P-value

Cohen’s d

mean ± SD

Age (years)

36.6 ± 5.1

33.9 ± 3.5

0.037*

0.617

Age when injury occurred (years)

23.0 ± 5.1

20.3 ± 2.6

0.019*

0.667

The period of injury (years)

13.5 ± 7.3

13.6 ± 2.9

0.949

0.018

Weight (kg)

77.5 ± 14.0

79.7 ± 11.6

0.548

0.171

Height (cm)

182.2 ± 7.7

176.9 ± 6.8

0.014**

0.729

BMI (kg/m2)

23.3 ± 3.4

25.4 ± 3.1

0.026*

0.645

BF (%)

21.1 ± 4.6

22.5 ± 3.7

0.049*

0.311

FM (kg)

16.1 ± 6.6

23.0 ± 3.0

0.000***

1.345

FFM (kg)

61.4 ± 8.3

57.7 ± 10.6

0.182

0.388

HGS (kg)

104.0 ± 11.2

92.8 ± 11.5

0.002**

0.944

AS (years)

2.6 ± 3.7

4.2 ± 5.1

0.226

0.359

AS (cigarette/day)

4.1 ± 5.3

3.9 ± 4.8

0.225

0.039

 

Active smokers men after SCI (n = 21)

Non-smokers men after SCI (n = 29)

P-value

Cohen’s d

mean ± SD

  

Age (years)

35.0 ± 4.4

35.4 ± 4.6

0.705

0.089

Age when injury occurred (years)

20.5 ± 5.1

22.5 ± 3.3

0.094

0.466

The period of injury (years)

15.1 ± 6.3

12.5 ± 4.6

0.101

0.471

Weight (kg)

74.0 ± 10.5

82.8 ± 12.4

0.012**

6.563

Height (cm)

176.4 ± 8.1

181.9 ± 6.6

0.011**

0.744

BMI (kg/m2)

23.8 ± 2.7

25.1 ± 3.8

0.202

0.394

BF (%)

20.5 ± 3.6

21.9 ± 4.8

0.276

0.329

FM (kg)

19.5 ± 5.8

19.7 ± 6.1

0.901

0.034

FFM (kg)

54.6 ± 9.1

63.1 ± 8.3

0.001***

0.976

HGS (kg)

95.5 ± 10.1

100.5 ± 14.6

0.180

0.398

  1. AS active smoking, BMI Body Mass Index, BF Body Fat, FM Fat Mass, FFM Fat Free Mass, HGS Hand Grip Strength; Student’s t-test P value reported for continuous variables. Statistical significance was set at the levels of *p ≀ 0.05, **p ≀ 0.01 and ***p ≀ 0.001