Table 3.

Assessment of testing patterns based on location of second (confirmatory) and next available CKD lab measure, overall and by CKD stage

Location of second CKD lab	Location of third CKD lab	N†	% (95% CI)†
Overall, n=72 228*
Primary health centre	Primary health centre	26 182	36.2% (35.9% to 36.6%)
Primary health centre	Hospital	5209	7.2% (7.0% to 7.4%)
Hospital	Primary health centre	3376	4.7% (4.5% to 4.8%)
Hospital	Hospital	37 461	51.9% (51.5% to 52.2%)
Among those stage 3a (eGFR 45–59), n=32 003
Primary health centre	Primary health centre	15 090	47.2% (46.6% to 47.7%)
Primary health centre	Hospital	2231	7.0% (6.7% to 7.3%)
Hospital	Primary health centre	1527	4.8% (4.5% to 5.0%)
Hospital	Hospital	13 155	41.1% (40.6% to 41.6%)
Among those stage 3b (eGFR 30–44), n=20 806
Primary health centre	Primary health centre	7650	36.8% (36.1% to 37.4%)
Primary health centre	Hospital	1583	7.6% (7.3% to 8.0%)
Hospital	Primary health centre	1039	5.0% (4.7% to 5.3%)
Hospital	Hospital	10 534	50.6% (50.0% to 51.3%)
Among those stage 4, n=11 394
Primary health centre	Primary health centre	2618	23.0% (22.2% to 23.7%)
Primary health centre	Hospital	927	8.1% (7.6% to 8.6%)
Hospital	Primary health centre	542	4.8% (4.4% to 5.2%)
Hospital	Hospital	7307	64.1% (63.2% to 65.0%)
Among those stage 5, n=8025
Primary health centre	Primary health centre	824	10.3% (9.6% to 10.9%)
Primary health centre	Hospital	468	5.8% (5.3% to 6.4%)
Hospital	Primary health centre	268	3.3% (3.0% to 3.8%)
Hospital	Hospital	6465	80.6% (79.7% to 81.4%)

^*16 045 individuals missing information on second or third facility location.

^†N (%) calculated out of individuals with available second and third facility location.

CKD, chronic kidney disease; eGFR, estimated glomerular filtration rate.