Correction: Pay-for-performance and continuity of care synergistically reduced amputation of lower extremity in patients with diabetes: a population-based cohort study.

Correction: BMC Health Serv Res 22, 748 (2022)

https://doi.org/10.1186/s12913-022-08075-2

Following publication of the original article [1], some numbers under the heading P4P & COCI in Table 2 needs to be moved from the column Model A to the column Model B. This problem is caused due to a typesetting error. The correct Table 2 is given below.

Table 2

Adjusted hazard ratios by Cox proportional hazard model for different risk factors of LEA

Covariate	Adjusted HR (95%CI)	Adjusted HR (95% CI)	Adjusted HR (95% CI)
	Model Aa	Model Bb	Model Cc
P4P (ref.: non-P4P)	0.35 (0.29-0.41)*		0.37 (0.30-0.44)*
COCI			0.08 (0.06-0.10)*
Low COCI (reference)
Middle COCI	0.49 (0.43-0.55)*
High COCI	0.23 (0.21-0.27)*
P4P & COCI
non-P4P, low COCI (reference)
non-P4P, middle COCI		0.68 (0.61-0.76)*
non-P4P, high COCI		0.26 (0.22-0.31)*
P4P, low COCI		0.53 (0.44-0.67)*
P4P, middle COCI		0.30 (0.23-0.38)*
P4P, high COCI		0.06 (0.04-0.10)*
Gender (ref.: female)
Male	1.16 (1.04-1.29) ǂ	1.09 (0.99-1.20)	1.15 (1.02-1.29)+
Age (ref.: 18< yr ≤ 55)
56 ≤ yr ≤ 69	0.85 (0.73-1.00)+	0.81 (0.70-0.94) ǂ	0.89 (0.75-1.06)
yr ≥ 70	0.71 (0.60-0.83)*	0.59 (0.51-0.69)*	0.73 (0.61-0.87)*
Diabetes duration (ref.: <5 yr)
5 ≤ duration <10	2.06 (1.54-2.76)	2.29 (1.76-2.98)*	2.09 (1.52-2.87)*
duration≥ 10	3.91 (2.93-5.20)	4.35 (3.36-5.63)*	3.90 (2.85-5.32)*
CCI score (ref: score=0)
1-2	0.55 (0.47-0.64)*	0.56 (0.48-0.64)*	0.55 (0.47-0.66)*
≥ 3	0.28 (0.21-0.39)*	0.31 (0.24-0.41)*	0.30 (0.21-0.41)*
DSCI score (ref: score=0)
1-2	1.07 (0.89-1.29)	1.05 (0.89-1.24)	1.11 (0.91-1.35)
≥ 3	1.77 (1.28-2.45)*	1.63 (1.21-2.19) ǂ	1.89 (1.34-2.65)*
CDD (ref: No)
Yes	0.72 (0.56-0.93)+	0.82 (0.65-1.05)	0.77 (0.58-1.01)
Residence (ref.: Rural)
Urban	0.82 (0.73-0.92)*	0.81 (0.73-0.91)*	0.83 (0.73-0.94) ǂ
Monthly salary/wage (ref.: FP and dependent)
< NTD 20,000	0.96 (0.83-1.10)	0.96 (0.84-1.09)	1.00 (0.86-1.15)
≥ NTD 20,000	0.85 (0.75-0.97)+	0.86 (0.76-0.96) ǂ	0.91 (0.80-1.04)
Health care facility level (ref.: Medical center)
Regional hospital	1.14 (1.00-1.31)	1.11 (0.98-1.26)	1.13 (0.98-1.31)
District hospital	1.06 (0.92-1.23)	1.02 (0.89-1.17)	0.99 (0.83-1.16)
Community clinic	0.87 (0.75-1.01)	0.86 (0.75-0.99) +	0.89 (0.75-1.05)
Akaike information criterion	30,787	36,804	30,699
Schwarz-Bayesian criterion	30,888	36,918	30,794

*p<0.001; ǂ p<0.01; + p<0.05

a Categorical time-dependent time-weighted average COCI, b Stratification of average time weightedaverage COCI by P4P, c Continuous time-weighted average COCI, ref Reference, TWA Time-weighted average, P4P Pay for performance, COCI Continuity of care index, Int Intermediate COCI, CCI Charlson comorbidity index, DSCI Diabetes severity comorbidity index, CDD Catastrophic disabling disease, FP Fixed premium

In calculating the cut-off points of tertiles for time-weighted average COCI 2010-2013, there was an error made in reporting so that the tertiles of the distribution of the COCI scores and thus the cutoffs should be corrected as follows:

“low COCI (< 0.360)” revised to (<0.50);

“middle COCI (0.360–0.643)” revised to (0.50-0.80);

“high COCI (≥ 0.643)” revised to (≥0.80).

Numbers to be revised are shown in the following 4 sections:

The original article [1] has been corrected.

Page 1, Abstract, Results: With the low COCI (<0.50) group as the reference, the aHR of LEA was 0.49 (p < 0.0001) for the middle COCI group, (p < 0.0001), and the aHR of LEA for the high COCI (≥0.80) group was 0.23 (p < 0.0001).

Page 3, Line 2: We divided the COCI scores into 3 subgroups based on the tertiles of the distribution for analysis: low (<0.50), middle (0.50-0.80), and high (≥0.80).

Page 8, Left column, Line 9-12: With the low COCI (<0.50) group as the reference, the aHR of LEA was 0.49 (p < 0.0001) for the middle COCI group, p < 0.0001, and the aHR of LEA for the high COCI (≥0.80) group was 0.23 (p < 0.0001).

Page 8, Right column, Line 4-8 In model B, with low COCI (<0.50) subgroup of non-P4P group as the reference, the aHR of LEA was 0.68 (p < 0.0001) for middle COCI subgroup of non-P4P group, 0.26 (p < 0.0001) for high COCI (≥0.80) …