The impact of COVID-19 pandemic on hospital admissions for nine diseases in Iran: insight from an interrupted time series analysis

Table 3 Estimated coefficients of segmented regression model for admission rate for nine diseases included in the study before and after COVID-19 pandemic in Iran

Diseases included in the study (ICD-10)	Intercept, β₀	Pre-COVID19 pandmic slope, β₁	Change in slope, β₂	Change in trend, β₃	Linear trend, β_p1^a
Certain infectious and parasitic diseases (A00–B99)	147.6*	− 0.47**	− 58.9*	− 2.46*	− 2.94*
Neoplasms (C00–D48)	201.9*	− 1.15*	− 88.5*	3.17*	2.01*
Mental and behavioural disorders (F00–F99)	16.4*	0.36*	− 12.1*	− 0.31**	0.05**
Diseases of the nervous system (G00–G99)	24.7*	0.29*	− 16.8*	− 0.54**	− 0.25**
Diseases of the circulatory system (I00–I99)	111.5*	− 0.22**	− 39.2*	1.44**	1.22**
Diseases of the respiratory system (J00–J99)	41.5*	0.76**	− 37.1*	− 1.21**	− 0.45**
Diseases of the digestive system (K00–K93)	70.9*	− 0.26**	− 28.5*	1.17*	0.91*
Diseases of the genitourinary system (N00–N99)	60.1*	− 0.07**	− 22.5*	1.03**	0.96*
Pregnancy, childbirth and the puerperium (O00–O99)	109.0*	− 0.21**	− 18.2*	1.73*	1.52*

^*Significant at the 5% level
**Not significant
^aThis obtained from the following time trend Equation:\({Y}_{pt}= {\beta }_{p0}+ {\beta }_{p1}*{time}_{pt}+{\varepsilon }_{t}\) where \({Y}_{pt}\) is the value of hospitalization rate per 100,000 population at time \(t\) after the Covid19 pandemic and \({time}_{pt}\) is the time trend variable which takes values between 1 (first observation after the pandemic) and 17 (last observation after the pandemic)

ISSN: 1478-7547