Table 3.

Respiratory function in light and dark conditions

Variable	Dark	Light	p value
Respiratory rate	456 ± 35	409 ± 59	0.046
Tidal vol/wt (ml)	0.29 ± 0.03	0.24 ± 0.02	0.003
Minute ventilation (ml/min)	132 ± 16	103 ± 17	0.003
Expiratory time (s)	0.10 ± 0.02	0.11 ± 0.02	0.211
Inspiratory time (s)	0.048 ± 0.001	0.051 ± 0.003	0.114
Peak inspiratory flow (ml/s)	9.97 ± 0.37	8.40 ± 0.31	0.004
Peak expiratory flow (ml/s)	6.16 ± 0.35	5.27 ± 0.30	0.049
Time to relaxation (s)	0.06 ± 0.01	0.07 ± 0.01	0.142

Data are mean ± SEM