List values in the field depending on the checked options

You can use this code as the custom calculation script of the "risks" field:

(Edit: code fixed)

var risks = [];
for (var i=1; i<=5; i++) {
	var v = this.getField("risk" + i).valueAsString;
	if (v!="Off") risks.push(v);
}
if (this.getField("risk6").valueAsString!="Off") risks.push(this.getField("other").valueAsString);
event.value = risks.join(", ");