Table 3.

Spearman and Pearson correlations for each shortened number of visits interval and the full 100 visits for CH₄, CO₂, O₂ and metabolic heat production (kcal/d)

Gas	Direction	Analysis	10 visits	20 visits	30 visits	40 visits	50 visits	60 visits	70 visits	80 visits	90 visits	100 visits
CH 4 , g/d	Forward	Spearman	0.69	0.82	0.87	0.98	0.99	0.99	0.99	0.98	0.99	1
		Pearson	0.68	0.86	0.93	0.97	0.98	0.99	0.99	0.99	0.99	1
	Reverse	Spearman	0.83	0.90	0.89	0.96	0.96	0.96	0.96	0.97	0.98	1
		Pearson	0.89	0.95	0.96	0.98	0.98	0.98	0.99	0.99	0.99	1
CO 2 , g/d	Forward	Spearman	0.70	0.86	0.93	0.95	0.95	0.98	0.98	0.99	0.99	1
		Pearson	0.67	0.82	0.93	0.96	0.97	0.98	0.99	0.99	0.99	1
	Reverse	Spearman	0.89	0.97	0.88	0.93	0.92	0.95	0.95	0.97	0.98	1
		Pearson	0.92	0.95	0.94	0.95	0.96	0.97	0.98	0.99	0.99	1
O 2 , g/d	Forward	Spearman	0.65	0.81	0.94	0.97	0.98	0.98	0.99	0.99	0.99	1
		Pearson	0.72	0.86	0.94	0.96	0.97	0.98	0.99	0.99	0.99	1
	Reverse	Spearman	0.88	0.91	0.90	0.95	0.96	0.98	0.98	0.99	1	1
		Pearson	0.93	0.95	0.94	0.95	0.97	0.98	0.98	0.99	0.99	1
Metabolic heat production, kcal/d	Forward	Spearman	0.67	0.81	0.90	0.95	0.97	0.99	0.99	0.99	1	1
		Pearson	0.71	0.86	0.94	0.96	0.97	0.98	0.99	0.99	0.99	1
	Reverse	Spearman	0.85	0.91	0.91	0.94	0.96	0.98	0.99	0.99	0.99	1
		Pearson	0.93	0.95	0.94	0.95	0.97	0.97	0.98	0.99	0.99	1