Figures
- Figure 1–
Structure of each node. The 12 intervention primary care units (PCi) had a bidirectional communication with the lung function laboratory playing a role as a support centre, whereas the six control primary care units (PCc) only transferred information to the support centre without any feedback. The five nodes were Bilbao (two PCi and two PCc), Cáceres (two PCi and one PCc), Vic (three PCi and one PCc), Badalona (two PCi and one PCc) and Barcelona (three PCi and one PCc).
- Figure 2–
Percentage of high-quality tests, i.e. scores A and B (three acceptable manoeuvres and best of two with differences in forced vital capacity (FVC) and/or forced expiratory volume in 1 s (FEV1) <150 mL, and three acceptable manoeuvres and best of two with differences in FVC and/or FEV1 <200 mL, respectively), in the intervention and control groups throughout the study period. *: p<0.05; ***: p<0.001.
- Figure 3–
Median scores of the different dimensions of the Software Usability Measurement Inventory questionnaire [20] to assess usability of the web application (see text for further explanation). Whiskers represent 95% confidence intervals.
Tables
- Table 1– Quality scores for spirometric manoeuvres according to American Thoracic Society (ATS)/European Respiratory Society (ERS) standardisation [9, 10, 17]
Score Description A 3 acceptable manoeuvres, and best 2 matched with differences in FVC and/or FEV1 <150 mL B 3 acceptable manoeuvres, and best 2 matched with differences in FVC and/or FEV1 <200 mL C 2 acceptable manoeuvres, and best 2 matched with differences in FVC and/or FEV1 <250 mL D 1 acceptable manoeuvre F 0 acceptable manoeuvres A and B were considered high-quality spirometry; C was considered to represent high variability among manoeuvres. FVC: forced vital capacity; FEV1: forced expiratory volume in 1 s.
- Table 2– Main characteristics of the two study groups
All Intervention Control p-value Subjects n 4581 3383 1198 Males % 55.7 55.2 56.8 0.335 Age yrs 53.6±18.9 54.5±18.0 51.1±21.0 <0.001 Height cm 163.2±10.5 163.5±10.0 162.2±11.7 0.030 FEV1 % pred 78.5±22.8 78.5±22.9 78.3±22.4 0.784 FVC % pred 83.5±19.6 83.8±19.6 82.5±19.3 0.037 FEV1/FVC % 71.6±13.1 71.2±13.3 72.6±12.6 0.001 Data are presented as mean±sd, unless otherwise stated. FEV1: forced expiratory volume in 1 s; % pred: % predicted; FVC: forced vital capacity. Bold indicates statistically significant p-values.
- Table 3– Status of forced spirometry (FS) among participating general practitioners (GPs) at baseline
GPs % Availability of FS equipment 26 Use of FS among those that had equipment 73 Specific training on FS 65 Knowledge of the equipment 7 Performance of the calibration routines 12
