The prevalence of chronic kidney disease in South Africa - limitations of studies comparing prevalence with sub-Saharan Africa, Africa, and globally

Table 2 shows the results of statistical tests of differences in CKD prevalence in South Africa versus sub-Saharan Africa, African and global studies

Comparative Region	Authors	Proportions	95% CI	Chi-Squared	p-value	Cramer’s V
Sub-Saharan Africa	Matsha et al. [19] (SA)	0.07570715	-0.08: − 0.05	39.249	< 0.001	0.025
	Stanifer et al. [22]	0.13900508		39.249		0.025
	Matsha et al. [19] (SA)	0.07570715	-0.05 : -0.01	10.78	< 0.001	0.035
	George et al. [8]	0.10702836		10.78		0.035
	Adeniyi et al. [20] (SA)	0.06339468	-0.10 : -0.05	22.633	< 0.001	0.019
	Stanifer et al. [22]	0.13900508		22.633		0.019
	Adeniyi et al. [20] (SA)	0.06339468	-0.07 : -0.02	8.919	< 0.001	0.033
	George et al. [8]	0.10702836		8.919		0.033
Africa	Matsha et al. [19] (SA)	0.07570715	0.01 : 0.04	23.035	< 0.001	0.015
	Kaze et al. [12]	0.04600130		23.035		0.015
	Matsha et al. [19] (SA)	0.07570715	-0.04 : -0.01	8.1396	0.004	0.007
	Abd ElHafeez et al. [11]	0.10100000		8.1396		0.007
	Adeniyi et al. [20] (SA)	0.06339468	-0.01 : 0.04	2.9644	0.090	0.006
	Kaze et al. [12]	0.04600130		2.9644		0.006
	Adeniyi et al. [20] (SA)	0.06339468	-0.06 : -0.01	7.1905	0.007	0.007
	Abd ElHafeez et al. [11]	0.10100000		7.1905		0.007
Global	Matsha et al. [19] (SA)	0.07570715	-0.04 : -0.01	11.321	< 0.001	0.001
	Hill et al. [4]	0.106		11.321		0.001
	Adeniyi et al. [20](SA)	0.06339468	-0.06 : -0.02	8.9222	< 0.001	0.001
	Hill et al. [4]	0.106		8.9222		0.001
	Matsha et al. [19](SA)	0.07570715	0.02 : 0.05	35.947	< 0.001	0.00
	Bikbov et al. [2]	0.0410000		35.947		0.00
	Adeniyi et al. [20] (SA)	0.06339468	-0.0002 : 0.04	5.6807	0.017	0.00
	Bikbov et al. [2]	0.0410000		5.6807		0.00

ISSN: 1471-2369