How to set radiogroup setvalue() function in ext JS?

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Javascript

ExtJS

I have a Radio group having radio buttons Male and Female. Please see below code:

{
                                xtype: 'radiogroup',
                                fieldLabel: 'Gender',
                                name: 'rbGender',
                                defaults: {
                                    flex: 1
                                },
                                layout: 'hbox',
                                items: [{
                                    boxLabel: 'Male',
                                    name: 'gender',
                                    inputValue: false,
                                    //checked: true,
                                    id: 'radio1'
                                }, {
                                    boxLabel: 'Female',
                                    name: 'gender',
                                    inputValue: true,
                                    id: 'radio2'
                                }]
                            }

I am unable to set these radio fields when I am getting values from database of gender field Male or Female(true/false).

What I have tried:

please see below code.

if (rec[0].gender == true) {
            me.form.getForm().findField('gender').setValue(true);
        }
        else if (rec[0].gender == false) {
            me.form.getForm().findField('gender').setValue(true);
        };