Table 1.

Subject characteristics and capsaicin cough thresholds

ID no.^{^a}	Sex	Age (years)	Session 1 C2 (μm)	Session 2 C2 (μm)
1	Male	35	15.63	15.63
2	Female	36	7.81	7.81
3	Male	49	15.63	15.63
4	Female	21	3.91	3.91
5	Female	21	3.91	3.91
6	Female	22	1.95	1.95
9	Male	21	15.63	15.63
10	Male	24	3.91	3.91
11	Male	21	3.91	3.91
12	Male	23	31.25	31.25
13	Male	28	7.81	3.91
14	Female	27	1.95	0.25
15	Female	19	0.98	0.98
16	Male	20	15.63	31.25
17	Male	18	7.81	7.81
18	Male	20	1.95	3.91
19	Male	19	7.81	7.81
20	Female	33	7.81	3.91
21	Male	26	7.81	7.81
Mean	Male	25.6 ± 6.2	8.71 ± 1.26^{^b}	9.33 ± 1.31^{^b}
Mean	Female	24.5 ± 11.2	3.23 ± 1.35^{^b}	2.29 ± 1.41^{^b}

↵^aData from two subjects were excluded from all analyses because of excessive event-related head motion (no. 7) and a failure to comply with the experimental protocol (no. 8).
↵^bC2 (concentration of capsaicin required to evoke two coughs) shown as geometric mean ± SE.