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Table 4 DID estimates of COVID-19 cases per 100 beds in the pre and post tracker use periods

From: The use and impact of digital COVID-19 tracking in adult social care: a prospective cohort study of care homes in Greater Manchester

 

Unadjusted event design

Adjusted event design

Matching based event design

Adjusted event design

Prior 34th day

1.24

1.50

3.22**

1.33

[0.54,2.84]

[0.63,3.56]

[1.15,9.01]

[0.60,2.95]

28 days to event

1.16

1.07

1.10

1.23

[0.34,3.93]

[0.31,3.74]

[0.22,5.58]

[0.38,3.98]

21 days to event

1.03

1.05

1.21

1.09

[0.34,3.07]

[0.38,2.90]

[0.54,2.71]

[0.39,3.03]

14 days to event

1.53

1.49

1.30

1.57

[0.65,3.58]

[0.68,3.27]

[0.58,2.92]

[0.68,3.60]

7 days to event

1.44

1.39

1.59

1.39

[0.88,2.37]

[0.86,2.25]

[0.79,3.19]

[0.94,2.06]

1 day to event

1.18

1.35

1.77

1.36

[0.76,1.83]

[0.82,2.20]

[0.82,3.83]

[0.86,2.17]

1 day after event

0.80

0.83

1.07***

0.84

[0.53,1.21]

[0.51,1.37]

[1.03,1.11]

[0.51,1.38]

7 days after event

0.68

0.70

0.82

0.70

[0.37,1.26]

[0.35,1.39]

[0.47,1.44]

[0.32,1.53]

14 days after event

0.40**

0.38**

0.51

0.45*

[0.19,0.85]

[0.17,0.86]

[0.19,1.42]

[0.20,1.02]

21 days after event

0.83

0.73

0.55

0.90

[0.24,2.87]

[0.19,2.75]

[0.13,2.28]

[0.24,3.32]

28 days after event

1.10

0.78

1.26

0.85

[0.27,4.48]

[0.19,3.13]

[0.37,4.32]

[0.22,3.31]

Beyond 34th day

1.08

1.05

1.67

1.03

[0.43,2.75]

[0.39,2.81]

[0.56,5.00]

[0.44,2.41]

N

98,890

95,033

41,245

95,026

Homes

410

406

174

406

Pseudo R-squared

0.314

0.381

0.394

0.434

  1. Cluster robust 95% confidence intervals are in the brackets. The coefficients are incidence rate ratios. For additional covariates included in each of the columns, see Table A3 in the Additional file 1: Appendix S4. Column 3 estimations were run on a matched sub-sample (matching was done on all the characteristics reported in the CQC data given in Table 1 with nearest 5 neighbours for each treated home). The estimations included 34 pre and 34 post uptake event indicators, but to save space reports only the ones with seven days gap. ***p<0.01, **p<0.05, *p<0.1