Retrospective Observations on the Ability to Diagnose and Manage Patients with Asthma through the Use of Impulse Oscillometry: Comparison with Spirometry and Overview of the Literature

Table 2

Patient followup.

Asthma patient	Followup FEV1	Followup AX	Followup R5	Followup R15	FEV1 % chg	AX % chg	R5 % chg	R15 % chg
1	4.01	9.69	3.51	2.67	−0.50%	−19.12%	−14.81%	−16.56%
2	4.33	6.9	3.86	2.72	4.09%	−33.46%	−4.22%	−3.89%
3	3.25	7.87	2.88	1.85	−9.72%	77.25%	3.60%	−7.04%
4	2.57	4.03	2.5	1.84	13.72%	−42.84%	−10.39%	−1.60%
5	1.78	7.46	2.32	1.59	18.67%	19.94%	−23.18%	−23.19%
6	1.24	26.32	5.59	3.81	−9.49%	−18.13%	−9.55%	1.87%
7	3.42	7.82	3.74	2.97	−3.39%	−33.84%	−17.80%	−22.86%
8	3.44	7.77	3.14	2.12	57.80%	0.39%	−13.26%	−16.21%
9	—	6.81	3.05	2.14	—	−21.81%	−17.79%	−14.06%
10	4.08	4.94	2.62	2.06	7.09%	−33.24%	−12.96%	−11.21%
11	2.29	17.6	5.49	3.82	19.90%	−26.24%	−15.15%	−4.02%
12	3.68	1.3	2.19	1.89	−10.90%	−42.98%	−19.49%	−17.47%
13	2.01	8.58	3.61	2.28	2.03%	−40.08%	−22.20%	−16.18%
14	3.94	1.97	2.36	2.08	0.25%	−51.72%	−1.26%	8.33%
15*	3.99	1.26	2.71	2.8	10.53%	−80.06%	−13.69%	1.45%
16	2.45	5.07	2.9	2.31	5.60%	−31.76%	3.94%	0.87%
17	3.21	1.64	2.7	2.43	3.22%	−46.23%	−25.62%	−23.82%
18	2.44	7.3	2.66	1.75	−2.01%	14.78%	18.22%	−4.89%
19	1.92	31.8	5.04	2.83	0.52%	41.71%	17.21%	2.91%
20	3.6	7.59	3.55	2.63	−4.76%	2.43%	−3.79%	−7.72%
21	2.64	9.65	3.32	2.27	0.00%	2.66%	−17.21%	−21.18%
22	3.58	3.04	2.53	1.96	−9.37%	−45.23%	−13.36%	−9.68%
23	2.53	5.35	3.01	2.5	6.30%	−14.13%	−15.45%	−20.63%
24	2.46	10.18	4.1	2.82	−0.81%	−6.35%	6.22%	7.63%
25	2.69	8.68	3.7	2.36	−1.82%	−11.97%	1.09%	−2.07%
26	2.88	6.06	3.76	2.95	−2.70%	−20.89%	−5.29%	−3.59%
27	—	4.15	3.02	2.51	—	−13.18%	1.68%	4.58%
28	—	4.97	3.27	2.68	—	−7.45%	−12.33%	1.52%
29	1.74	13.77	3.52	2.3	8.75%	−2.06%	−3.56%	−9.45%
30	2.96	3.23	2.7	2.04	25.42%	−38.24%	3.85%	−0.49%
31	2.43	9.41	3.33	2.05	−3.95%	−0.53%	16.84%	5.67%
32	2.95	9.42	4.11	2.81	−1.99%	−54.49%	−14.91%	−14.33%
33	—	6.29	4.17	3.86	—	−58.94%	−15.07%	−1.03%
34	—	10.36	2.97	2.25	—	−48.12%	−29.29%	−21.05%
35	—	11.2	4.02	2.55	—	−31.37%	−9.66%	−13.56%
36	—	6.8	2.32	1.69	—	19.72%	9.95%	−0.59%
37	—	12.02	3.39	2.4	—	−43.28%	−22.78%	−16.08%
38	2.81	3.15	2.51	1.96	2.93%	−47.93%	−18.24%	−15.88%
39	1.69	10.27	2.94	1.86	−6.63%	−34.75%	−22.63%	−22.50%
				Mean	0.04	−0.21	−0.09	−0.08
				Number	31	39	39	39
				Test statistic	1.6	−4.41	−4.49	−5.41
				Critical value of t.05, n−1
				1 tailed	2.04	2.02	2.02	2.02
				2 tailed	1.7	1.68	1.66	1.64
				𝑃 value	0.10>𝑥>0.05	𝑥<0.005	𝑥<0.005	𝑥<0.005

∗denotes patient referenced in Figure 1.