. 2016 Nov 17;17:154. doi: 10.1186/s12931-016-0470-0

Table 3.

Test-duration and provocation-doses of methacholine (mg) needed to achieve the different provocation-dose levels

Comparison of average test-duration until different PD-levels reached
	Number	Mean	SD	Lower 95%CL	Upper 95%CL
PD₄₀ sG_eff	484	14:45	05:54	14:15	15:14
PD₂₀ FEV₁	484	17:46	05:16	17:18	18:14
PD₂₀ FEF₅₀	484	16:17	05.36	15:47	16:47
Test-duration: sG_eff < FEV₁; sG_eff < FEF₅₀; FEF₅₀ < FEV₁ (p<0.001)
Provocation-doses of methacholine (mg) needed to reach the different PD levels
PD₄₀ sG_eff
AHR	409	.495	.491	.447	.543
No AHR	75	2.185	.059	2.17	2.197
PD₂₀ FEV₁
AHR	176	.739	.615	.647	.830
No AHR	243	2.189	.044	2.183	2.194
PD-level not reached	65	.873	.450	.761	.985
PD₂₀ FEF₅₀
AHR	307	.625	.588	.559	.691
No AHR	146	2.188	.046	2.180	2.195
PD-level not reached	31	.936	.496	.754	1.117
Comparison between the 3 test procedures assessed by summary independent sample t-test
		mean diff.	SE	t	Significance
PD₄₀ sG_eff versus PD₂₀ FEV₁		.244	.048	5.088	p<.000
PD₄₀ sG_eff versus PD₂₀ FEF₅₀		.130	.040	3.223	p=.001
PD₂₀ FEV₁ versus PD₂₀ FEF₅₀		.114	.056	2.011	p=.045