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Table 2 Participation according to survey area and urban income group

From: The burden of headache disorders in North India: methodology, and validation of a Hindi version of the HARDSHIP questionnaire, for a community-based survey in Delhi and national capital territory region

Dwellings

Prospective participants

Habitation (survey area) and urban income groupa

Enumerated

Locked or ineligible

Visited and eligible (N)

Declined

Interviewed (n)

Participating proportion (n/N) (%)

Rural (Ballabgarh)

1,434

427

1,007

17

990

98.3

Urban (Delhi)

6,444

4,411

2,033

957

1,076

52.9

 low-income (Ambedkar Nagar)

1,935

1,528

407

51

356

87.5

 middle-income (Rithala)

684

335

349

48

301

86.2

 high-income (Greater Kailash)

3,825

2,548

1,277

858

419

32.8

Total

7,878

4,838

3,040

974

2,066

68.0

  1. aSee text for explanation