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Table 2 Univariate regression analysis of variables associated with BMD at femoral neck

From: Oxygen desaturation during the 6-min walk test as a risk for osteoporosis in non-cystic fibrosis bronchiectasis

Parameter

beta

Standard error

95% CI

t

p-value

Gender

0.435

0.341

−0.247~  1.117

1.275

0.207

Age (year)

−0.024

0.014

−0.051 ~  0.004

−1.698

0.094

BMI (kg/m2)

0.066

0.029

0.008 ~  0.123

2.271

0.027*

Desaturation

−1.228

0.270

−1.768 ~ −0.687

−4.541

< 0.001*

HRCT score

−0.047

0.031

−0.108 ~  0.014

−1.547

0.127

Lowest SpO2 during 6MWT (%)

0.064

0.017

0.03 ~  0.098

3.770

< 0.001*

6MWD (M)

0.004

0.001

0.002 ~  0.006

3.636

0.001*

FEV1(L)

0.756

0.253

0.25 ~  1.262

2.986

0.004*

Severe exacerbation

−0.134

0.033

−0.201~0.068

−4.040

< 0.001*

Short-term systemic corticosteroid loading

−0.065

0.021

−0.106 ~  0.024

−3.148

0.002*

  1. Abbreviations: HRCT high resolution computed tomography, BMI body mass index, 6MWT six minute walk test, SpO2 oxygen saturation by pulse oximetry, 6MWD six minute walk distance, FEV1 forced expiratory volume in 1 s, CI confidence interval