. 2022 May 27;2022:9305190. doi: 10.1155/2022/9305190

Table 2.

The potential risk factors of TBL and HBL.

Parameters	Patients	MBL		P	HBL		P
Parameters	Patients	Mean	SD	P	Mean	SD	P
Gender
Male	38	1724.75	542.07	0.356	504.78	200.43	0.258
Female	76	1620.88	575.18	0.356	460.24	195.80	0.258
Age (year)
≥14	62	1600.31	537.45	0.256	465.81	210.45	0.586
<14	52	1721.33	592.82	0.256	486.16	182.50	0.586
BMI (kg/m²)
≥17.88	57	1733.87	628.72	0.139	478.37	194.67	0.860
<17.88	57	1577.15	484.06	0.139	471.80	202.15	0.860
Operative time (min)
≥300	62	1939.87	549.54	<0.001^∗	586.50	182.39	<0.001^∗
<300	52	1316.46	358.23	<0.001^∗	342.26	116.78	<0.001^∗
The number of surgical fixation segments
≥10	58	2007.51	517.46	<0.001^∗	614.93	162.55	<0.001^∗
<10	56	1290.93	332.09	<0.001^∗	330.24	104.14	<0.001^∗
The number of pedicle screws
≥16.5	57	1972.28	539.72	<0.001^∗	603.93	176.08	<0.001^∗
<16.5	57	1338.73	382.78	<0.001^∗	346.25	118.27	<0.001^∗
PLT_pre (10⁹/L)
≥234.65	57	1611.10	535.24	0.403	448.19	177.17	0.147
<234.65	57	1699.92	592.96	0.403	501.99	214.29	0.147
PLT_post (10⁹/L)
≥177.15	57	1482.81	486.91	0.001^∗	444.15	181.11	0.095^∗
<177.15	57	1828.21	586.78	0.001^∗	506.03	209.84	0.095^∗
TBV (mL)
≥3318	57	1568.05	544.20	0.417	459.99	210.36	0.098^∗
<3318	57	1742.97	574.78	0.417	490.19	184.57	0.098^∗
Hospital stay (day)
≥12	77	1755.56	591.98	0.006^∗	493.30	195.22	0.157
<12	37	1447.30	439.36	0.006^∗	437.19	199.77	0.157
Risser sign
≥4	69	1654.46	619.98	0.980	482.15	216.48	0.639
<4	45	1657.12	472.423	0.980	464.26	166.26	0.639
Type of scoliosis
1	68	1669.90	566.87	<0.001^∗	469.08	183.24	<0.001^∗
5	37	1472.22	438.07		421.81	186.84
Others	9	2300.27	561.28		739.52	149.25
Correction angle (°)
≥28	59	1750.31	555.71	0.063^∗	507.12	183.29	0.073^∗
<28	55	1553.80	560.21	0.063^∗	440.73	208.07	0.073^∗

^∗ indicates a potential risk factor (P < 0.1). BMI: body mass index; TBL: total blood loss; HBL: hidden blood loss; TBV: total blood volume; PLT_pre: preoperative platelets; PLT_post: postoperative platelets.