Table 2. Data needed, in each of the feasible types of inventory study, to estimate underreporting of tuberculosis cases in India.

Characteristics of tuberculosis case	Data sources
	Survey of all providers in sampled areas	Survey of all providers in large areas suitable for capture–recapture analysis	Survey of all providers with assessment of underdiagnosis
Not reported to the case notification system
No access to health system	Household surveys	Provider survey with capture–recapture analysis	Household surveys
No utilization of health system	Household surveys		Household surveys
Using non-RNTCP providers:			Provider survey
Not diagnosed	Assessment of laboratory capacity or knowledge and practices of health staff
Diagnosed but not reported	Provider survey
Using RNTCP providers:
Not diagnosed	RNTCP case-finding efforts score or the number of patients examined per case
Diagnosed but not reported	Provider survey
Diagnosed and reported to the case notification system	Case notifications	Case notifications	Case notifications

RNTCP: Revised National Tuberculosis Control Programme.