Table 3– Pulmonary function of study patients before and 6 months after weight reduction: per protocol analysis

	Control group^#			Treatment group^¶
	Visit 0	Visit 6	p-value	Visit 0	Visit 6	p-value
FEV₁ L	1.64±0.13	1.67±0.12	ns	1.85±0.15	2.01±0.15	ns
FEV₁ % pred	59.2±4.2	61.5±3.2	ns	64.08±3.35	70.00±4.89	ns
FVC L	2.55±0.11	2.48±0.12	ns	2.92±0.17	3.16±0.16	0.002⁺
FVC % pred	74.5±1.5	74.4±2.0	ns	82.42±3.16	87.75±2.99	ns
FEV₁/FVC	0.64±0.04	0.67±0.03	ns	0.64±0.03	0.64±0.04	ns
FEF_25–75% L	1.08±0.18	1.09±0.15	ns	1.13±0.21	1.32±0.23	ns
FEF_25–75% % pred	37.6±6.3	39.18±5.39	ns	36.75±5.70	44.92±6.78	ns
IC L	2.16±0.11	2.03±0.17	ns	2.49±0.17	2.45±0.19	ns
IC % pred	96.7±5.6	93.5±7. 5	ns	109.00±6.08	103.42±7.25	ns
TLC L	5.54±0.29	5.22±0.19	ns	5.70±0.26	5.80±0.36	ns
TLC % pred	111.2±3.3	107.2±4.5	ns	113.50±4.71	111.92±4.76	ns
ERV L	0.44±0.07	0.38±0.07	ns	0.40±0.09	0.73±0.17	ns
ERV %	41.1±6.6	33.9±6.1	ns	35.75±11.60	63.67±19.45	ns
RV L	2.96±0.28	2.69±0.19	ns	2.80±0.26	2.62±0.32	ns
RV % pred	186.4±13.7	171.0±14.0	ns	168.33±10.60	158.75±17.54	ns
RV/TLC	0.53±0.03	0.51±0.03	ns	0.49±0.03	0.44±0.03	ns
R_aw cmH₂O·L⁻¹·s⁻¹	4.69±0.58	4.10±0.54	ns	3.44±0.40	3.63±0.39	ns
R_aw % pred	257.5±31.0	220.4±29.0	ns	188.00±21.17	202.75±20.57	ns
G_aw L·s⁻¹·cmH₂O⁻¹	0.16±0.03	0.09±0.02	ns	0.16±0.03	0.09±0.01	ns
G_aw % pred	31.8±6.6	43.2±8.1	ns	42.33±6.80	43.08±6.79	ns

Data are presented as mean±se unless otherwise stated. p-values were calculated by ANOVA. FEV₁: forced expiratory volume in the 1 s; FVC: forced vital capacity; FEF_25–75%: forced expiratory flow at 25–75% of FVC; IC: inspiratory capacity; TLC: total lung capacity; ERV: expiratory reserve volume; RV: residual volume; R_aw: airway resistance; G_aw: airway conductance; ns: nonsignificant. ^#: n=11; ^¶: n=12; ⁺: p=0.006 between groups.