. 2022 Apr 27;26(3):102352. doi: 10.1016/j.bjid.2022.102352

Table 3.

Paired analysis of the categorical variables of pulmonary function tests results at 45 and 180 days.

Variable	Total pairs	Ward		P**	Total pairs	ICU		P-value**
Variable	Total pairs	Proportion changed D45 n (%)	Proportion changed 180 n (%)	P**	Total pairs	Proportion changed D45 n (%)	Proportion changed 180 n (%)	P-value**
Dyspnea	85	41 (48.2)	38 (44.7)	0.711	73	41 (56.2)	30 (41.1)	0.071
Dyspnea (mMRC) >=2	17	10 (58.8)	11 (64.7)	1.000	15	10 (66.7)	10 (66.7)	1.000
Cough	83	20 (24.1)	21 (25.3)	1.000	73	22 (30.1)	13 (17.8)	0.064
VC< LLN, (%) ^a	85	16 (18.8)	17 (20.0)	1.000	77	34 (44.2)	16 (20.8)	0.014
FVC< LLN, (%) ^a	93	25 (26.9)	22 (23.7)	0.728	82	39 (47.6)	23 (28.0)	0.003
FEV₁< LLN, (%) ^a	93	31 (33.3)	22 (23.7)	0.200	82	37 (45.1)	23 (28.0)	0.044
FEV₁/FVC< LLN, (%) ^a	93	37 (39.8)	30 (32.3)	0.371	82	27 (32.9)	33 (40.2)	0.430
TLC< LLN, (%) ^a	82	78 (95.1)	79 (96.3)	1.000	69	67 (97.1)	68 (98.6)	1.000
DLCO < LLN, (%) ^b	78	6 (7.7)	8 (10.3)	0.791	65	22 (33.8)	5 (7.7)	< 0.0001
MIP < LLN, (%) ^b	80	32 (40.0)	36 (45.0)	0.644	74	27 (36.5)	27 (36.5)	1.000
MEP < LLN, (%) ^b	80	76 (95.0)	75 (93.8)	1.000	73	68 (93.2)	72 (98.6)	0.219
Exercise oxygen desaturation (Δ SpO₂ ≥ 4%) ^a	88	62 (70.5)	61 (69.3)	1.000	73	44 (60.3)	61 (83.6)	0.003
Borg_Final ≥ 4 ^a	72	36 (50.0)	18 (25.0)	0.005	61	23 (37.7)	18 (29.5)	0.473

Missing data (≤ 10%);

Missing data (11-12%);

ICU: intensive care unit; VC: vital capacity; FVC: forced vital capacity; LLN: lower limit of normality; FEV1: forced expiratory volume in the first second; mMRC: modified Medical Research Council; TLC: total lung capacity; RV: residual volume; DLCO: carbon monoxide diffusion; MIP: maximal inspiratory pressure; MEP: maximal expiratory pressure; SpO₂: pulse oxygen saturation; Δ:variation.** McNemar's chi-square.