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Table 2 Cooperation and refusal rates by subsample

From: To send or not to send: weighing the costs and benefits of mailing an advance letter to participants before a telephone survey

Rate (%)

Group

p

No Letter (n = 138)

Letter (n = 137)

Response

69 (50.0)

81 (59.1)

0.147

Refusal

9 (6.5)

5 (3.6)

0.412

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BMC Research Notes

ISSN: 1756-0500

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