Table 4.

Comparison of normal non-indexed coronary artery measurement data with of the present study other geographical area studies.

CAS (mm)	C	Present study n = 933, M:F 521:412	Ozan et al, 2016 Turkish study n = 77, M:F 26:51	p-value	Imad et al, 2014 Iraqi-Kurdish study M:F 59:29	p-value	Felix et al, 2006 USA study M:F 55:90	p-value	Kim et al, 2005 Korean study M:F 23:53	p- value
LMCA	T	4.16 ± 0.70	4.59 ± 0.76	<0.001∗	NA	NA	NA	NA	NA	NA
LMCA	M	4.24 ± 0.70	4.59 ± 0.86	0.01	4.86 ± 0.77	<0.001∗	4.7 ± 0.70	<0.001∗	4.4 ± 0.50	0.28
LMCA	F	4.07 ± 0.66	4.35 ± 0.69	<0.001∗	4.5 ± 0.73	<0.001∗	4.2 ± 0.60	0.09	4.5 ± 0.60	<0.001∗
LAD-p	T	3.22 ± 0.60	3.48 ± 0.53	<0.001∗	NA	NA	NA	NA	NA	NA
LAD-p	M	3.29 ± 0.59	3.63 ± 0.51	<0.001∗	3.6 ± 0.58	<0.001∗	3.7 ± 0.60	<0.001∗	3.9 ± 0.40	<0.001∗
LAD-p	F	3.13 ± 0.58	3.4 ± 0.52	<0.001∗	3.31 ± 0.46	0.10	3.3 ± 0.50	0.01	3.6 ± 0.60	<0.001∗
LCx-p	T	3.02 ± 0.62	3.11 ± 0.67	0.22	NA	NA	NA	NA	NA	NA
LCx-p	M	3.09 ± 0.62	3.29 ± 0.67	0.11	3.26 ± 0.62	0.05	3.6 ± 0.60	<0.001∗	3.3 ± 0.50	0.11
LCx-p	F	2.94 ± 0.61	3.01 ± 0.66	0.44	3.03 ± 0.39	0.43	3 ± 0.50	0.38	3.1 ± 0.50	0.07
RCA-p	T	3.05 ± 0.65	3.45 ± 0.50	<0.001∗	NA	NA	NA	NA	NA	NA
RCA-p	M	3.14 ± 0.66	3.55 ± 0.46	<0.001∗	3.26 ± 0.65	0.19	3.8 ± 0.80	<0.001∗	4.1 ± 0.40	<0.001∗
RCA-p	F	2.95 ± 0.62	3.4 ± 0.52	<0.001∗	3.02 ± 0.55	0.55	3.3 ± 0.60	<0.001∗	3.7 ± 0.50	<0.001∗

AbbreviationsC, Category, LMCA, Left main coronary artery, LAD (P), Left anterior descending artery (Proximal part), DIAG, Diagonal branch of left anterior descending artery, LCx (P), Left circumflex coronary artery (Proximal part), OM, Obtuse Marginal branch of left circumflex coronary artery, RCA (P), Right coronary artery (Proximal part), M, Males, F, Females, NA, Not applicable.

Statistical test used: Student t-test, p < 0.05 and p < 0.001∗ indicates a statistically significant difference.