Table 2. The number and underreporting rate of pulmonary tuberculosis (PTB) cases enrolled in the 2015 nationwide Tuberculosis Information Management System (TBIMS) underreporting survey in China.

Categories	Number	Proportion (%)	Underreporting cases	Underreporting rate (%)	p	χ2
Abbreviation: ID=Infectious Disease, DHF=designated health facility, MDR/RR=multi-drug resistant/rifampin resistant, TB=tuberculosis. * The chi square and p-value are the result of testing between laboratory-confirmed cases and clinically-diagnosed cases.
Gender					<0.0001	30.23
Male	79,463	69.43	6,362	8.01
Female	34,800	30.41	3,028	8.70
Not recorded	187	0.16	33	17.65
Age groups (years)					<0.0001	381.36
0–14	609	0.53	135	22.17
15–64	87,689	76.62	6,462	7.37
≥65	26,152	22.85	2,826	10.81
Diagnosis categories					<0.0001*	127.27*
Laboratory confirmed	33,037	28.87	2,206	6.68
- MDR/RR	978	0.85	317	32.41
Clinically diagnosed	81,413	71.13	7,217	8.86
Data sources					<0.0001	30.23
Outpatient	91,427	79.88	4,507	4.93
Inpatient	14,485	12.66	3,939	27.19
Laboratory	8,538	7.46	977	11.44
Reporting area					<0.0001	1218.90
Within living provinces	113,755	99.39	9,038	7.95
Out of living provinces	695	0.61	385	55.40
Classification of health facilities					<0.0001	19971.59
Provincial DHFs	4351	3.80	1,090	25.05
Provincial TB/ID-specific hospitals	1,375	1.20	468	34.04
Provincial general health facilities	746	0.65	301	40.35
Prefectural DHFs	8,234	7.19	1,348	16.37
Prefectural TB/ID-specific hospitals	1,016	0.89	282	27.76
Prefectural general health facilities	2,110	1.84	545	25.83
County-level DHFs	87,102	76.10	1,943	2.23
County-level general health facilities	9,516	8.31	3,446	36.21
Total	114,450	100.00	9,423	8.23