Table 3.

Comparison of spirometric variables in the first and third trimesters between nulliparous and multiparous women.

Variable		Nulliparous (n=54)		Multiparous (n=66)		Sig (p)
	T	Mean±SD	Median (Min - Max)	Mean±SD	Median (Min - Max)
Absolute	FVC	1	3.645±0.537	3.67 (2.65 - 4.89)	3.688±0.400	3.70 (2.89 - 4.70)	0.646
		3	3.531 ±0.509	3.57 (2.67 - 5.00)	3.533 ±0.416	3.49 (2.72 - 4.89)	0.979
	FEV1	1	3.142±0.419	3.18 (2.29 - 4.07)	3.010±0.317	2.97 (2.15 - 4.12)	0.071
		3	3.015 ±0.407	3.01 (2.24 - 4.00)	2.923 ±0.367	2.91 (2.12 - 4.05)	0.196
	FEV1/FVC	1	0.863±0.049	0.87 (0.75 - 0.96)	0.816±0.059	0.82 (0.70 - 0.97)	<0.0001
		3	0.856 ±0.047	0.85 (0.75 - 0.98)	0.827 ±0.047	0.84 (0.72 - 0.96)	0.001
	FEF25-75%	1	3.657±0.797	3.71 (2.10 - 5.29)	3.207±0.911	3.24 (1.63 - 5.79)	0.005
		3	3.558 ±0.727	3.59 (1.96 - 5.33)	3.253 ±0.788	3.26 (1.54 - 4.84)	0.031
	PEF	1	6.346±1.176	6.17 (3.87 - 9.40)	6.043±1.049	6.07 (3.78 - 9.76)	0.140
		3	6.137 ±1.032	6.30 (3.77 - 8.84)	5.965 ±0.905	6.12 (3.72 - 9.06)	0.330
% predicted values	FVC	1	101.48±11.881	101.00 (79 - 126.00)	101.17±9.002	101.50 (83.00 - 123.00)	0.873
		3	98.00 ±12.349	97 (74.00 - 128.00)	96.55 ±9.169	98.00 (75.00 - 121.00)	0.474
	FEV1	1	101.57±11.661	102.00 (80.00 - 130.00)	97.68±9.945	98.50 (78.00 - 121.00)	0.051
		3	97.43 ±11.721	97.00 (75.00 - 125.00)	94.65 ±10.374	95.00 (73.00 - 122.00)	0.172
	FEV1/FVC	1	98.22±5.784	99.00 (84.00 - 108.00)	96.03±7.027	96.00 (83.00 - 116.00)	0.069
		3	97.52 ±6.433	99.00 (83.00 - 107.00)	97.55 ±5.816	98.50 (85.00 - 114.00)	0.981
	FEF25-75%	1	99.46±22.094	98.00 (51.00 - 161.00)	93.17±26.918	90.00 (53.00 - 173.00)	0.170
		3	96.59 ±21.913	98.50 (46.00 - 151.00)	95.15 ±25.085	94.00 (50.00 - 150.00)	0.741
	PEF	1	83.22±14.392	82.00 (50.00 - 114.00)	78.90±15.014	80.00 (49.00 - 127.00)	0.152
		3	80.61 ±11.794	81.00 (51.00 - 108.00)	78.21 ±13.263	79.00 (48.00 - 117.00)	0.352