Table 6. Comparison of spirometry results between patients submitted to MRM with or without immediate reconstruction.

	MRM and immediate breast reconstruction (n=40)	MRM alone (n=41)	P value	95% confidence interval of the difference
				Lower	Upper
Forced expiratory volume in 1 s (FEV1) in liters
Basal	2.2±0.38	2.1±0.35	0.20	−0.26	0.03
1 h	1.3±0.41	1.5±0.44	0.04	0.01	0.40
6 h	1.4±0.40	1.8±0.44	0.001	0.11	0.46
12 h	1.5±0.44	1.7±0.52	0.03	0.03	0.45
24 h	1.9±0.68	2.0±0.44	0.45	−0.16	0.35
Forced vital capacity (FVC) in liters
Basal	2.2±0.43	2.3±0.43	0.12	−0.04	-0.34
1 h	1.6±0.60	1.9±0.42	0.02	0.10	0.54
6 h	1.7±0.41	2±0.45	0.001	0.14	0.52
12 h	1.8±0.38	2.1±0.49	0.06	−0.01	0.38
24 h	1.9±0.47	2.1±0.74	0.17	−0.08	0.46
Peak expiratory flow (PEF) in liters
Basal	4±1.6	3.8±1.3	0.46	−0.90	0.42
1 h	2.6±1.3	2.6±1	0.87	−0.05	0.56
6 h	2.5±1.6	3.2±1.3	0.03	−0.05	1.36
12 h	3.0±1.0	3.5±1.3	0.04	0.02	1.05
24 h	3.5±1.7	3.7±1.5	0.60	−0.64	0.90
Ratio of FEV1 to FVC (FEV1/FVC) in percentage
Basal	91±5.5	89±5.8	0.12	−4.40	0.56
1 h	84±5.9	86.1±6.9	0.14	−0.73	5.0
6 h	84.1±10.4	86±9.8	0.50	−4.7	3.9
12 h	88.1±6	86±5.5	0.19	−4.8	0.36
24 h	90.1±5	89±6.2	0.35	−3.67	1.32
Oxygen saturation in percentage (O2)
Basal	97.6±1.8	97±2	0.22	−1.38	0.33
1 h	95.6±2.2	96.3±1.9	0.16	−0.26	1.54
6 h	95.8±2.5	95.4±2.2	0.44	−2.0	0.37
12 h	96.1±2.7	96±2.1	0.61	−1.42	0.69
24 h	97.0±2.2	96±2.3	0.20	−1.60	0.36

Values are expressed as means ± standard deviation.