A theory-based process evaluation alongside a randomised controlled trial of printed educational messages to increase primary care physicians’ prescription of thiazide diuretics for hypertension [ISRCTN72772651]

Table 2 Demographics comparison of baseline respondents and non-respondents

Demographic factor		Respondents	Non-respondents	Population^a	Test results^b
Graduating year	Mean	1978	1977	1981	t(263) = 0.329, p = 0.742
Sex	Male	77.3 %	78.8 %	63.0 %	χ ²(1, N = 265) = 0.081, p = 0.776
Urban/rural	Urban	89.1 %	91.1 %	91.9 %	χ ²(1, N = 265) = 0.302, p = 0.582
University affiliation	Yes	9.2 %	2.1 %	9.3 %	χ ²(1, N = 265) = 6.771, p = 0.009
CFPC member	Yes	43.7 %	30.8 %	46.7 %	χ ²(1, N = 265) = 4.684, p = 0.030

20 % random sample. n = 119 for respondents and n = 146 for non-respondents (four (respondents) and six (non-respondents) participants could not be found using MD Select and are thus not included in the analysis)
^aPopulation based upon all physicians in Ontario specialising in either family medicine or physician/general practice (N = 10,429)
^bTest results compare respondents to non-respondents

ISSN: 1748-5908