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Table 1 Characteristics of men who participated versus those who dropped out of The Olmsted County Study of Urinary Symptoms and Health Status among Men, Rochester, Minnesota (1989–2003)

From: Dropout in a longitudinal, cohort study of urologic disease in community men

 

Baseline Questionnaire†

 

Participated

Dropped out‡

 
 

No.

%

No.

%

Chi-sq p

AGE (years)

     

40–49

734

46.7

336

49.3

0.01

50–59

458

29.2

138

20.2

 

60–69

293

18.7

105

15.4

 

70+

85

5.4

103

15.1

 

AUASI*

     

≤ 7

1105

70.4

452

66.3

0.05

> 7

465

29.6

230

33.7

 

QMAX (mL/s)*

     

≥ 12

1297

82.8

532

78.2

0.01

< 12

269

17.2

148

21.8

 

PSA (ng/mL)*

     

≤ 1.4

329

75.3

107

70.9

0.28

> 1.4

108

24.7

44

29.1

 

VOL (cm3)*

     

≤ 30

300

68.8

94

62.7

0.17

> 30

136

31.2

56

37.3

 
  1. * AUASI, American Urological Association Symptom Index; QMAX, peak urinary flow rate; PSA, Prostate-Specific Antigen; VOL, prostate volume.
  2. † Age was calculated based on the age at baseline questionnaire completion.
  3. ‡ No questionnaire completed in seventh biennial contact year.
  4. § Men who died between contacts were excluded, n = 195.
  5. ¶ Of the 195 excluded men, 46 were men in the clinic subset.
  6. # PSA and VOL measurements are from the randomly selected in-clinic subset, n = 588.
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BMC Medical Research Methodology

ISSN: 1471-2288

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