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. 2021 Nov 17;1(11):e0000029. doi: 10.1371/journal.pgph.0000029

Table 1. Interrupted time series analysis results showing incidence rate ratios (IRR) and relative risk (RR)for COVID-19 intervention, time and trend alongside 95% confidence intervals.

    Total deliveries Live births Caesarean sections rate Admissions > 5 Medical
Ownership   IRR 95%CI P-value IRR 95%CI P-value RR 95%CI P-value IRR* 95%CI* P-value*
Public COVID-19 0.89 (0.79–1.02) 0.08 0.89 (0.80–0.99) 0.04 1.10 (1.06–1.14) <0.01 0.71 (0.63–0.79) <0.01
Time 1.00 (0.99–1.01) 0.67 1.00 (0.99–1.01) 0.42 1.01 (1.00–1.01) <0.01 1.00 (0.99–1.00) 0.57
Trend 0.99 (0.97–1.00) 0.11 0.99 (0.97–1.00) 0.07 1.00 0.99–1.00) 0.14 1.01 (0.99–1.03) 0.10
Private COVID-19 0.91 (0.81–1.03) 0.13 0.91 (0.81–1.03) 0.12 1.03 (0.98–1.09) 0.25 0.66 (0.60–0.72) <0.01
Time 1.00 (0.99–1.01) 0.06 1.00 (0.99–1.01) 0.03 1.00 (1.00–1.01) 0.02 1.00 (1.00–1.01) 0.01
Trend 1.03 (1.01–1.04) <0.01 1.03 (1.01–1.04) <0.01 0.99 (0.98–0.99) 0.01 1.03 (1.01–1.04) <0.01
    Admissions < 5 Paediatrics Admissions > 5 Surgical NBU Admissions rate
Ownership   IRR * 95%CI * P-value * IRR* 95%CI * P-value * RR 95%CI P-value
Public COVID-19 0.41 (0.38–0.45) <0.01 0.75 (0.64–0.87) <0.01 0.92 (0.83–1.01) 0.09
Time 1.00 (1.00–1.01) <0.01 1.00 (0.99–1.00) 0.46 1.00 (1.00–1.01) 0.02
Trend 1.04 (1.03–1.05) <0.01 1.01 (0.99–1.03) 0.19 1.01 (1.00–1.02) 0.04
Private COVID-19 0.38 (0.33–0.45) <0.01 0.72 (0.64–0.81) <0.01 0.87 (0.72–1.04) 0.13
Time 1.00 (0.99–1.01) 0.38 1.00 (0.99–1.00) 0.82 1.00 (0.99–1.01) 0.21
Trend 1.07 (1.05–1.08) <0.01 1.02 (1.01–1.04) <0.01 0.99 (0.97–1.02) 0.48

*Estimates from ARMA models. The ARMA (p,q) parameters for admissions in medical, surgical and paediatrics are (2,0), (1,0) and (2,0) respectively.