ATTORNEYS FOR APPELLANT:        ATTORNEYS FOR APPELLEE:

DAVID J. MALLON, JR.                JOHN D. RAIKOS
JENNIFER M. WEFLEN                Indianapolis, Indiana
Ice Miller Donadio & Ryan
Indianapolis, Indiana                 D. CHARLES GANTZ
                            Gantz & Associates
                            Greenwood, Indiana

 INDIANA UNIVERSITY MEDICAL         )
CENTER, RILEY HOSPITAL FOR                  )
CHILDREN,                                   )    
                                            )
    Appellant-Defendant,                    )    Supreme Court Cause Number
                                            )    49S02-0003-CV-220
        v.                                  )
                                            )    Court of Appeals Cause Number
BRENDA LOGAN, Mother and Natural,           )    49A02-9812-CV-997
Guardian of JORDAN DAVIS, a Minor,          )
                                            )
    Appellee-Plaintiff.                     )

Based on my review of all available records, the only stressor identified which could be associated with causation of the clinical problems is the theophylline overdose.

R. at 87. As the Court of Appeals correctly determined, the attached exhibit containing Dr. Schramm’s opinion was inadmissible because it was not sworn. An unsworn letter from an expert may not be considered in summary judgment proceedings. Johnston v. State Farm Mut. Auto. Ins. Co., 667 N.E.2d 802, 806 (Ind. Ct. App. 1996). However it is nonetheless the case that Logan’s affidavit refers to Dr. Schramm and the fact that he had an opinion concerning Jordan’s care. Logan’s submissions on May 21, 1998, included a properly verified affidavit of Dr. Schramm that dictated in pertinent part:
It is my opinion based upon a reasonable degree of medical certainty, that the medical care and treatment rendered to Jordan Davis by University Medical Center, and Riley Hospital for Children fell below a reasonable standard of care in the theophylline overdose documented in the medical records in the hospitalization of Jordan Davis at Riley Hospital.

It is my further opinion based upon a reasonable degree of medical certainty that the ultimate medical condition and injuries, received by Jordan Davis between March 4 through March 8, 1991, i.e., massive physiological stress of the theophylline overdose documented by the Hospital Records, is clearly the type of stressor which can precipitate the clinical appearance of the symptoms of the bipolar disorder, and more probably than not was caused by the inappropriate care rendered by the Riley Hospital staff.
R. at 267-68. Dr. Schramm’s affidavit expands on the reference to him and his opinion found in Logan’s own timely filed affidavit. We therefore view the Dr. Schramm affidavit as merely a supplement to Logan’s affidavit. See T.R. 56(E). Thus, the question is whether the trial court abused its discretion in considering the late-filed affidavit when ruling on Hospital’s motion for summary judgment. An abuse of discretion occurs when the trial court’s decision is against the logic and effect of the facts and circumstances before it. Vernon v. Kroger Co., 712 N.E.2d 976, 982 (Ind. 1999).
The record here shows that on the date originally scheduled for hearing on Hospital’s motion for summary judgment, Hospital filed among other things a motion to strike Logan’s affidavit and attached exhibits. The trial court took the motion to strike under advisement, ordered the parties to submit briefs by May 22, and subsequently rescheduled the summary judgment hearing until August 11. It was during this period, more specifically on May 21, that Logan submitted the affidavit of Dr. Schramm. Admitting the affidavit, filed after the deadline date but well before the date of the hearing, was not against the logic and effect of the facts and circumstances before the court. In sum, the trial court did not abuse its discretion. This case has been pending since the filing of Logan’s complaint in May 1996. Both parties have engaged in extensive discovery including depositions, interrogatories, and requests for admissions. Indeed, prior to Hospital’s motion for summary judgment, the trial court had conducted a pre-trial conference, and this case was scheduled for a four-day jury trial in June 1998. Hospital has neither argued nor demonstrated that the supplemental affidavit works to its prejudice. On the other hand, absent the affidavit there is no issue of material fact concerning the cause of Jordan’s injuries. See footnote With the affidavit there is such a dispute, and accordingly the trial court properly denied Hospital’s motion for summary judgment.