Incidence, characteristics and risk factors for alveolar recruitment maneuver-related hypotension in patients undergoing laparoscopic colorectal cancer resection

Table 2 Univariate analysis of the associations between baseline characteristics and alveolar recruitment maneuver-related hypotension

	ARM-related hypotension		P value
	Yes, n = 34	No, n = 106
Male	24	78	0.83
Age (yr)	71.7 ± 6.4	69.1 ± 5.5	< 0.01
Age ≥ 74 yr	15	22	< 0.01
Body weight (kg)	60.8 ± 8.8	62.5 ± 9.6	0.36
Body mass index (kg/m2)	22.54 ± 2.77	23.18 ± 2.63	0.22
Hemoglobin (g/L)	116.1 ± 23.4	121.5 ± 21.5	0.21
White blood cells (× 109/L)	6.84 ± 2.25	6.34 ± 1.94	0.20
C-reaction protein (mg/L)	3.50 (1.39, 7.98)	2.84 (1.02, 6.78)	0.31
Albumin (g/L)	38.4 ± 3.6	39.4 ± 4.0	0.16
SpO2 (%)	96 (96, 97)	97 (96, 97)	0.07
SpO2 (< 96/≥ 96)	8/26	14/92	0.18
Mean arterial pressure (mmHg)	89 ± 8	91 ± 7	0.10
ASA physical status (II/III)	24/10	86/20	0.23
Cardiocerebrovascular events	4	11	0.76
Chemotherapy	5	14	0.78
Hypertension	14	42	> 0.99
Body weight loss ≥ 10%	10	24	0.49
Diabetes mellitus	3	17	0.40

Continuous data are reported as the mean ± SD or median (25^th and 75^th percentile), and categorical data are given as counts. Alveolar recruitment maneuver (ARM)-related hypotension: Mean arterial pressure < 60 mmHg during an ARM or within 5 min after an ARM. ARM: Alveolar recruitment maneuver; S_pO₂: Saturation of peripheral oxygen; ASA: American Society of Anesthesiologists.