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Table 2 CATI versus Diary responses: Garden irrigation

From: Collecting household water usage data: telephone questionnaire or diary?

Question

CATI response

N = 219

Diary response

N = 219

CATI response relative to Diary

weighted kappa

(agreement*)

 

Average

(standard deviation)

% using

(N)

Average (standard deviation)

% using

(N)

 

Number of garden watering sessions last 7 days

1.7

(1.79)

72.2% (158)

2.9

(2.24)

86.3%

(189)

0.36

(poor)

Automatic watering system duration use (min)

38.0

(19.2)

15.5% (34)

55.4

(26.4)

11.9%

(26)

0.51

(fair to good)

Hand held hose duration use (min)

26.3

(16.9)

40.6% (89)

26.5

(32.7)

58.0% (127)

0.36

(poor)

Fixed manual system duration use (min)

45.3

(23.9)

17.4% (38)

43.2

(17.12)

12.8% (28)

0.21

(poor)

Hose and sprinkler duration use (min)

60.2

(24.8)

13.2% (29)

54.6

(33.5)

22.8% (50)

0.05

(poor)

  1. * Fleiss JL: Statistical methods for rates and proportions 2nd edition, New York; Wiley; 1981:218