Validity and reliability of an adapted questionnaire measuring knowledge, awareness and practice regarding familial hypercholesterolaemia among primary care physicians in Malaysia

Table 3 Known-groups validity by comparing mean percentage scores in knowledge and practice regarding FH between PCP-PG-Qual and PCP-noPG-Qual

KAP domain	Mean (± SD) percentage score of PCP-PG-Qual n = 31	Mean (± SD) percentage score of PCP-noPG-Qual n = 99	Mean difference in percentage score (95% CI)	t value^a (df)^b	p-value^c
Knowledge	53.5 (13.99)	35.9 (11.79)	17.54 (12.52, 22.57)	6.90 (128)	< 0.001
Practice	69.2 (17.62)	54.4 (19.28)	14.74 (7.05, 22.44)	3.79 (128)	< 0.001

Abbreviations: KAP, knowledge, awareness and practice; SD, standard deviation; df, degree of freedom; CI, confidence interval; n, number; PCP-PG-Qual, primary care physicians with postgraduate qualification; PCP-noPG-Qual, primary care physicians without postgraduate qualification;
^a Independent t-test was used to compare means as the data were normally distributed. The null hypothesis was rejected as the calculated t value > critical t value
^b df: degrees of freedom of the critical value of t
^c Significant p < 0.05

ISSN: 1471-2261