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Table 5 Calculation of response rates

From: The VicHealth Indicators population survey: methodology, prevalence of behavioural risk factors, and use in local policy

 

Total sample

Landline

Mobile phone

Total phone numbers used

277,832

68,429

209,403

I=Complete Interviews (1.1)

22,819

14,737

8082

R = Refusal and break off (2.1)

8048

2401

5647

NC=Non-contact (2.2)

2220

1392

828

O=Other (2.0, 2.3)

3872

2426

1446

e

0.282

0.639

0.163

UH=Unknown Household (3.1)

102,700

26,643

76,057

UO=Unknown other (3.2–3.9)

44,049

9007

35,042

Response Rate 3

 I/((I + P) + (R + NC + O) + e (UH + UO))

29.1%

33.7%

23.7%