बांथोरफो गिदिंफिनाय () नायसंनायखौ नायबिजिरथिफोरनि confounderफोर आरो भुमखौराङारि थुबुरखौ(clustering) हिसाबखालामनो बानसननाय जादोंमोन।
Multilevel regression analysis was undertaken to account for confounders and geographical clustering of observations.