Risk-adjusted cesarean section rates for the assessment of physician performance in Taiwan: a population-based study

Tang, Chao-Hsiun; Wang, Han-I; Hsu, Chun-Sen; Su, Hung-Wen; Chen, Mei-Ju; Lin, Herng-Ching

doi:10.1186/1471-2458-6-246

Table 2 Distribution of selected parturient risk factors by physician quartile

From: Risk-adjusted cesarean section rates for the assessment of physician performance in Taiwan: a population-based study

	Physician quartile												χ² test on distribution of patient risks	χ² test on CS rate for patient risks
	Quartile 1			Quartile 2			Quartile 3			Quartile 4
	No.	%	CS rate	No.	%	CS rate	No.	%	CS rate	No.	%	CS rate	p value	p value
Obstetric factors
Malpresentation	2314	5.65	97.84	3881	7.13	99.15	3559	7.83	98.65	2982	9.43	99.56	< 0.0001	< 0.0001
Prolapsed cord	12	0.03	91.67	31	0.06	100.00	15	0.03	86.67	13	0.04	84.62	0.14	0.20
Antepartum hemorrhage, abruptio/previa placenta	335	0.82	89.55	811	1.49	94.45	783	1.72	93.49	982	3.11	97.76	< 0.0001	< 0.0001
Pregnancy factors
Previous CS history	3373	8.23	95.67	5879	10.79	96.19	6233	13.71	97.83	5201	16.45	98.96	< 0.0001	< 0.0001
Insufficient or excessive fetal growth	232	0.57	64.66	379	0.70	73.09	365	0.80	84.93	280	0.89	88.21	< 0.0001	< 0.0001
Genital herpes	12	0.03	50.00	21	0.04	80.95	23	0.05	56.52	21	0.07	95.24	0.10	0.0066
Diabetes mellitus	185	0.45	35.14	194	0.36	56.19	175	0.38	64.00	117	0.37	79.49	0.11	< 0.0001
Anemia	583	1.42	42.88	745	1.37	58.66	486	1.07	63.58	472	1.49	81.14	< 0.0001	< 0.0001
Cardiac disease	13	0.03	46.15	42	0.08	64.29	30	0.07	50.00	31	0.10	80.65	0.0047	0.0477
Arterial hypertension	175	0.43	41.71	217	0.40	63.59	162	0.36	61.73	111	0.35	78.38	0.25	< 0.0001
Eclampsia/preeclampsia	282	0.69	62.41	369	0.68	82.66	403	0.89	83.62	330	1.04	92.73	< 0.0001	< 0.0001
Polyhydramnios/oligohydramnios	92	0.22	33.70	107	0.20	60.75	106	0.23	65.09	74	0.23	67.57	0.56	< 0.0001
Infection of the amniotic cavity	57	0.14	49.12	82	0.15	74.39	76	0.17	92.11	85	0.27	87.06	0.0001	< 0.0001
Congenital/acquired abnormality of cervix/vagina	7	0.02	42.86	14	0.03	79.57	16	0.04	93.75	13	0.04	100.00	0.22	0.0053
Premature labor	1269	3.10	24.11	1798	3.30	42.32	1626	3.58	53.75	1186	3.75	63.83	< 0.0001	< 0.0001
Premature rupture of membranes	1283	3.13	19.56	1974	3.62	26.55	1715	3.77	31.66	1092	3.45	48.08	< 0.0001	< 0.0001
Cervical incompetence	8	0.02	12.50	22	0.04	27.27	23	0.05	39.13	40	0.13	75.00	< 0.0001	0.0002
Other risk factors
Nulliparous	19,726	48.14	20.86	26,622	48.88	29.38	22,882	50.34	37.24	15,504	49.03	50.79	< 0.0001	< 0.0001
Gestational weeks
< 37	3008	7.34	34.71	4419	8.11	43.77	3932	8.65	54.43	2983	9.43	64.30	-	< 0.0001
≥ 42	131	0.32	22.90	198	0.36	36.36	145	0.32	40.69	102	0.32	50.00	< 0.0001	0.0002
Multiple gestation	975	2.40	65.33	1400	2.57	77.57	1432	3.15	85.61	1441	4.56	90.35	< 0.0001	< 0.0001
Maternal age ≥ 35 yr	4212	10.28	34.59	5752	10.56	47.79	5699	12.54	54.17	4753	15.03	64.09	< 0.0001	< 0.0001

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ISSN: 1471-2458

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