Input data boolean ke database dengan php

saya bingung cara ngisi data yang tipe datanya itu boolean di postgre, saya punya tabel yg berisi field namanya is_male. nanti saat ngisi form di browser jika yang ngisi cowok brarti data yang masuk cowok di databasenya di centang , kalo cewek berarti uncentang

if ($selected_radio == 'male') {
 $male_status = TRUE;
}
else if ($selected_radio == 'female') {
 $female_status = FALSE;
}
if($errMsg == ''){
   try {
 $stmt = $db->prepare('INSERT INTO sso.users ( username, password, full_name, is_male,
                     email, phone, company, job_position, address, is_verified)VALUES
                    (:username, :password, :full_name, :gender, :email, :phone, :company,
                   :job_position, :address, :is_verified);');
$stmt->execute(array(
	':username' => $username,
	':password' => $password,
	':full_name' => $full_name,
	':gender' => $selected_radio,
	':email' => $email,
	':phone' => $phone,
	':company' => $company,
	':job_position' => $job_position,
	':address' => $address,
	':is_verified' => FALSE
));

mohon koreksinya,