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. 2020 Oct 1;26:e925314-1–e925314-9. doi: 10.12659/MSM.925314

Table 4.

Comparison of adverse events between groups before and after propensity score matching.

Variable Before matching After matching
Group I (n=66) Group S (n=95) P-value Group I (n=58) Group S (n=58) P-value
Hypertension1, n (%) 28 (42.4) 38 (0.40) 0.758 24 (41.4) 25 (43.1) 0.851
Hypotension2, n (%) 21 (31.8) 21 (22.1) 0.167 18 (31.0) 12 (20.7) 0.203
Blood transfusion3, n (%) 7 (10.6) 13 (13.7) 0.560 6 (10.3) 6 (10.3) 1.000
ICU admission, n (%) 1 (1.5) 4 (4.2) 0.649 1 (1.7) 3 (5.2) 0.618
Second surgery, n (%) 1 (1.5) 0 (0) 0.410 1 (1.7) 0 (0) 1.000
In-hospital mortality, n (%) 1 (1.5) 1 (1.1) 1.000 1 (1.7) 1 (1.7) 1.000
Awareness, n (%) 1 (1.5) 0 (0) 0.410 0 (0) 0 (0) 1.000

Values are expressed as mean±standard deviation or number of patients (n, %). Groups: I, BIS indices maintained at about 10 less than the BIS value at LOC; S, BIS indices maintained at 40–60. ICU – Intensive Care Unit; BIS – bispectral index; LOC – loss of consciousness.

1

Hypertension: use of any vasodilator during surgery to maintain systolic blood pressure no more than 140 mmHg;

2

Hypotension: use of any vasopressor during surgery to maintain systolic blood pressure no less than 90 mmHg;

3

Blood transfusion: the number of patients receiving blood transfusion during surgery and/or after surgery.