Table 4

Triangulation—acceptability of treatment and protocol

QuantitativeQualitativeConvergence
IMT acceptability/adherenceHigh adherence rates. Few devices replaced due to malfunction.
One withdrawal due to adverse effect.
Five requested an IMT device. Four participants went on to participate in PR.
Participants motivated at baseline to use the device with positive beliefs about consequences, goals and reinforcement. Few technical problems reported.
Feedback surrounding IMT was positive, particularly that treatment was within the home setting.
Partial agreement
InterviewsAll IMT participants agreed to interview at baseline.Well received.Agreement
DiaryFew completed.Diaries acceptable at baseline. At follow-up, participants forgot or did not wish to fill in the diary. Mixed views given regarding its value.Partial agreement
QuestionnairesCompleted—few missing values.No problems reported.Agreement
AccelerometerMajority had no problem and were adherence with the device. One participant had eczema and could not wear the armband.Some concerns raised at baseline. One participant thought it may be mistaken for an ‘ASBO’ device. No problems voiced by those who wore device. Accelerometry was preferable to a walk test.Partial agreement
PiMax testingCompleted with no adverse effects.No problems were reported in performing the inspiratory muscle strength manoeuvres.Agreement
Sniff testVaried completion and poor reliability.Most participants were accepting of the sniff test.Partial agreement
SpirometryCompleted with no adverse effects.Participants reported that they had previously had difficulties with spirometry within their general care. No problems experienced during study spirometry.Agreement
VisitsVisits cancelled mainly due to participant illness.Satisfied with physiotherapists. The duration of the IMT session was acceptable. The number and duration of visits were acceptable. Feedback about staff was positive.Agreement
  • IMT, inspiratory muscle training.