Intra-abdominal Pressures during Voluntary and Reflex Cough

Cough

Table 1 AUC Values for Voluntary and Involuntary Reflex Cough.

Subject	VC AUC (cm H2O·s)	RCT AUC (cm H2O·s)	VC mean IAP (cm H₂O)	RCT mean IAP (cm H₂O)	VC max IAP (cm H₂O)	RCT max IAP (cm H₂O)
1	92	125	35.2	48.4	87	100
2	290	781	52.5	52.4	167	175
3	326	1063	31.6	49.8	100	170
4	375	1214	37.5	28.5	165	139
5	612	1308	70.2	58.9	211	174
6	483	1148	65.5	73.5	180	194
7	505	1239	55.0	50.8	139	173
8	488	1321	42.0	73.6	165	275
9	124	703	26.1	28.5	104	149
10	201	964	39.1	38.0	77	100

Subject 10 had a T₄ complete spinal cord injury, and the IAP measurements were extremely low with a markedly compromised total cough force generated for VC and involuntary reflex cough as indicated by the AUC values of 22 and 111, respectively. As such, this subject was excluded from all statistical comparisons of VC and involuntary reflex cough.