Table 2.

Analysis of pH, PaO_2, PaCO_2, and HCO₃ values in the groups

		T1	T2	T3	T4	T5
pH	Group C (n = 30)	7.42 ± 0.04b	7.37 ± 0.04	7.36 ± 0.04	7.37 ± 0.04	7.40 ± 0.05
	Group R (n = 30)	7.42 ± 0.03b	7.36 ± 0.03	7.34 ± 0.05	7.36 ± 0.04	7.39 ± 0.03
	P	0.800	0.830	0.337	0.327	0.800
PaO2 (mmHg)	Group C (n = 30)	163.3 ± 52.5	173.9 ± 47	177.6 ± 44.2c	177 ± 62.2	151.7 ± 39
	Group R (n = 30)	150.1 ± 55.7	153.4 ± 48.2	166.2 ± 47.9	211.5 ± 77.1d	177.4 ± 37.9
	P	0.352	0.092	0.340	0.169	0.017a
PaCO2 (mmHg)	Group C (n = 30)	40.8 ± 5.9	44.6 ± 4.8c	42.7 ± 4.9	40.4 ± 5.7	42.7 ± 4.2
	Group R (n = 30)	39.1 ± 4.1	44.1 ± 3.4c	45.2±6c	42.4±6c	39.9 ± 2.7e
	P	0.141	0.605	0.075	0.107	0.012a
HCO3	Group C (n = 30)	25.8 ± 2.5	25.4 ± 2.2	24.2 ± 2.5f	23.4 ± 2.5f	22.8 ± 2.8f
	Group R (n = 30)	25 ± 2.2	24.9 ± 1.9	24.6 ± 2.4	24 ± 2.3	23.8 ± 1.9
	P	0.158	0.375	0.559	0.308	0.096

PaO₂, arterial oxygen pressure; PaCO₂, arterial carbon dioxide pressure; HCO₃, bicarbonate value. Values give as mean ± standard deviation. Comparisons between groups used Mann-Whitney U test; comparisons within groups used Wilcoxon signed ranks test

^aComparison between groups is statistically significant

^bWithin groups, comparisons with T2, T3, T4, and T5 are statistically significant

^cWithin groups, comparisons with T1 are statistically significant

^dWithin groups, comparisons with T1, T2, and T3 are statistically significant

^eWithin groups, comparisons with T2 and T3 are statistically significant

^fWithin groups, comparisons with T1 and T2 are statistically significant