Table 1

Characteristics of all invited frail patients (responders and non-responders)
All frail patients# Patients willing to participate Not willing^ No response>
(n = 1249)
Dyspnoea* No dyspnoea<
(n = 4142)
(n = 841) (n = 408) (n = 1774) (n = 1119)
Age (years), mean (sd) 75.6 ± 6.9 74.6 ± 6.3· 73.8 ± 6.1 76.3 ± 7.0 75.9 ± 7.2
Male sex, n (%) 1956 (47.2%) 419 (49.8%) 270 (66.2%) 763 (43.0%) 504 (45.0%)
Co-morbidities (number), median (IQR) 3 (3–4) 3 (3–4) 3 (3–4) 3 (3–4) 3 (3–4)
Drugs (number), median (IQR) 5 (4–7) 6 (4–7) 5 (3–6) 5 (4–7) 6 (4–7)

#All selected frail patients aged 65 years or over, *patients who were willing to participate and fully met the inclusion criteria (MRC dyspnoea ≥2 and/or a positive answer on questionnaire about reduce exercise tolerance), <patients who were willing to participate, but were excluded based on complaints (MRC dyspnoea score ≤1 and only negative answers on the questionnaire about reduce exercise tolerance), ^patients who were not willing to participate, >patients who gave no response after sending 2 written invitations. P = <0.05 compared to the patients with dyspnoea, p = ns dyspnoea patients compared to patients not participating in the study (no dyspnoea, not willing and no response), ·p = <0.05 dyspnoea compared to patients not participating in the study.

van Mourik et al.

van Mourik et al. BMC Public Health 2012 12:385   doi:10.1186/1471-2458-12-385

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