A Study to Compare the Efficacy of Alendronate With and Without Calcium or Calcium Alone In the Treatment of Osteoporosis in Postmenopausal Women (0217-088)(COMPLETED)

Inclusion Criteria : * Patient is postmenopausal (or surgically menopausal) for at least 5 years. * Patient must be diagnosed with osteoporosis * Patient has spinal anatomy suitable for DEXA of the lumbar spine Exclusion Criteria : * Patient is receiving or has received treatment prior to randomization which might influence bone turnover * Patient has a history of or evidence for metabolic bone disease (other than postmenopausal bone loss) * Patient is receiving or is expected to receive during the course of the study any medication (other than study medication) which might alter bone or calcium metabolism