In these consolidated appeals, plaintiff Doris Mattison and defendant Pontiac Osteopathic Hospital each appeal by leave granted an order of the Worker’s Compensation Appellate Commission (wcac) that reversed in part the magistrate’s decision granting plaintiff an open award of benefits and denied defendant’s claim for a credit for wages paid to plaintiff by another employer. We affirm in part, reverse in part, and remand to the WCAC.
*667 Plaintiff began working for defendant in 1992 as a nurse’s assistant. Her jobs included bathing patients, passing bed trays, walking patients in the hallways, giving back rubs, and changing beds. Plaintiff testified that on June 16, 1992, she slipped going up the stairs at work, turning her left ankle. She was eventually diagnosed as suffering from a ganglion cyst that developed as a result of the trauma. Plaintiff returned to work in August 1992, although she testified that she continued to feel a lot of pain. Over the next few years, plaintiff complained of pain in both feet. Plaintiff was diagnosed as suffering from osteoarthritis, and x-rays show arthritic changes in both feet.
In January 1995, plaintiff began working a second job, with Operation Able, processing applications for Ford, Chrysler, and General Motors, and registering applicants for job services. Plaintiff worked four horns a day, from 10:00 A.M. until 2:00 P.M., and then reported for her 3:00 P.M. shift at the defendant hospital. She testified that the work at Operation Able did not bother her feet because she sat all the time.
Plaintiff’s last day of work at the hospital was July 4, 1995. She testified that she did not feel she could continue to work because of the pain. Plaintiff continued to work for Operation Able until November 1996. She left that job, not because of any problems with her feet, but to help her daughter-in-law in New Jersey.
Plaintiff filed a petition for benefits, claiming that she is disabled as a result of a specific event injury in June 1992 and a last-day-of-work injury, i.e., plaintiff alleged that her work up through and including her last day of work aggravated or contributed to her disability.
*668
In an opinion and order mailed September 30, 1997, the magistrate found no grounds for awarding benefits on the basis of any complaints regarding plaintiffs right foot. The magistrate did find that plaintiff continued to suffer from the effects of the June 16, 1992, left ankle twisting, specifically the ganglion cyst and the scar tissue resulting from injections she received in the area in an attempt to eliminate the cyst. The magistrate also found that plaintiff was entitled to benefits on the basis of an ongoing symptomatic aggravation of the osteoarthritis in her left ankle. The magistrate noted that pursuant to subsection 301(2) of the Worker’s Disability Compensation Act (WDCA), MCL 418.301(2); MSA 17.237(301)(2), osteoarthritis as a condition of the aging process is compensable only if it is aggravated or accelerated by the employment in a significant manner. The magistrate found no evidence that the pathology of the left ankle was significantly aggravated by plaintiff’s employment. However, citing
McDonald v Meijer, Inc,
*669 Defendant appealed, and in an opinion and order dated February 10, 1999, the WCAC affirmed with a modification. The wcac found that the magistrate’s conclusion that plaintiff is disabled because of the ganglion cyst was based on competent, material, and substantial evidence on the whole record and so affirmed. However, the WCAC rejected the alternative basis for awarding benefits. The wcac engaged in a lengthy review of this Court’s decisions regarding the propriety of awarding benefits when work does not cause or aggravate the underlying pathology, but only aggravates the symptoms of a nonwork-related condition. The wcac stated its belief that this Court has misinterpreted a number of Supreme Court decisions, and opined that benefits should not be awarded when symptoms only are affected by work. The wcac noted that no published decision addressed the question whether benefits may be awarded on this basis when the underlying condition is one governed by subsection 301(2), such as plaintiff’s osteoarthritis, which requires that a claimant show that the work aggravated or accelerated the condition in a significant manner. The wcac concluded that symptomatic aggravation is not a proper basis for awarding benefits under subsection 301(2), and so reversed this portion of the magistrate’s decision.
Finally, the wcac affirmed the magistrate’s denial of a credit for wages earned at Operation Able. Citing
Bowles v James Lumber Co,
In Docket No. 218082, plaintiff argues that the wcac erred in finding that, as a matter of law, a symptomatic aggravation of a condition of the aging process is not compensable under the wdca, MCL 418.101
et seq.]
MSA 17.237(101)
et seq
1
We agree. The WCAC must consider the magistrate’s findings of fact conclusive if they are supported by competent, material, and substantial evidence on the entire record. MCL 418.861a(3); MSA 17.237(861a)(3);
Mudel v Great Atlantic & Pacific Tea Co,
It is the settled law of this state that benefits may be awarded when a claimant’s work only aggravates or exacerbates the symptoms of an underlying condition, even if the underlying condition itself was not caused, aggravated, or accelerated by the work. In
Laury v General Motors Co (On Remand, On Rehearing),
The question presented is whether the result should be different in cases governed by subsection 301(2), i.e., in cases where a claimant must show that the employment contributed to or aggravated or accelerated a mental disability or condition of the aging process in a significant manner.
2
We hold that the same
*672
rule of law applies. Awarding benefits on the basis of the aggravation of symptoms alone accords with the policy underlying the act. The objective of the wdca is to compensate a claimant for the loss of an earning capacity caused by a work-related injury.
Kuty v DAIIE,
In arriving at the contrary conclusion, the WCAC relied on
Farrington v Total Petroleum, Inc,
However, on the basis of the Supreme Court’s holding in Farrington, we find that when the underlying condition is the sort governed by subsection 301(2), a claimant must show that the work aggravated or exacerbated the symptoms of the condition in a significant manner, i.e., that the work played a significant role in aggravating the symptoms, considering the totality of both work and nonwork factors. Farrington, supra at 215-216. This accords with legislative policy as reflected in subsection 301(2), which imposes a higher standard on a plaintiff claiming that a condition of the aging process or a mental disability was aggravated or exacerbated by his work. Id.
Because the magistrate did not consider the degree to which plaintiff’s employment aggravated her symptoms, we remand to the wcac for a determination whether plaintiff’s work aggravated the symptoms of her condition in a significant manner. MCL 418.861a(14); MSA 17.237(861a)(14); Mudel, supra at 713-714. If the WCAC finds that the record is insufficient to make this factual determination, it must remand to the magistrate. Id.
We address next defendant’s argument in Docket No. 218086 that the WCAC erred in affirming the magistrate’s ruling that defendant was not entitled to a credit for wages plaintiff earned at Operation Able.
*674
The magistrate’s ruling in this regard was made taking into account the finding of a single injury date of June 16, 1992, which was before plaintiff’s employment at Operation Able. Plaintiff argued before the WCAC that the magistrate should have found a later injury date of July 4, 1995, plaintiff’s last day of work at the hospital, at which time she was also employed by Operation Able, and then determined plaintiff’s benefits under MCL 418.361(1); MSA 17.237(361)(1), which governs situations where a plaintiff’s incapacity for work resulting from a personal injury is partial. See
Lawrence v Toys R Us,
Given the magistrate’s factual finding that plaintiff experienced aggravation of the symptoms of her condition to the point of disability on her last day of work for the hospital, if the wcac finds that plaintiff’s hospital employment aggravated plaintiff’s symptoms in a significant manner, then as a matter of law, plaintiff suffered a last-day-of-work injury. MCL 418.301(1); MSA 17.237(301)(1). Subsection 371(2), MCL 418.371(2); MSA 17.237(371)(2), provides that the “average weekly wage” for purposes of computing benefits “means the weekly wage earned by the employee at the time of the employee’s injury in all employment. . . .” In Lawrence, supra at 122-123, our Supreme Court held that the statute requires the aver *675 age weekly wage to be computed on the basis of all employment, even if the injury does not disable the employee from all employment. An employer is protected from paying unnecessary compensation by subsection 361(1), which provides that a partially disabled employee is entitled to eighty percent of the difference between the after-tax average weekly wage earned before the injury and the after-tax average weekly wage the employee is able to earn after the injury. Lawrence, supra at 124-125.
Here, plaintiffs benefits were calculated on the basis of her hospital wages alone, using a single injury date of June 16, 1992. Under subsection 361(1), using July 4, 1995, as the injury date and taking all employment into account, plaintiffs benefits may differ from those calculated by the magistrate. In the event the WCAC determines that plaintiffs employment aggravated the symptoms of her condition in a significant manner, the WCAC should determine whether the benefit amount established by the magistrate is appropriate and adjust that amount if necessary. Again, if the record is insufficient for the WCAC to make such a determination, it must remand to the magistrate. Mudel, supra at 713-714. However, we affirm the decision of the wcac to the extent that it found defendant is not entitled to a direct credit for plaintiffs Operation Able wages.
Affirmed in part, reversed in part, and remanded to the wcac. We do not retain jurisdiction.
Notes
Plaintiff does not contest on appeal the magistrate’s finding that her osteoarthritis is a condition of the aging process.
MCL 418.301(2); MSA 17.237(301)(2) provides as follows:
Mental disabilities and conditions of the aging process, including but not limited to heart and cardiovascular conditions, shall be *672 compensable if contributed to or aggravated or accelerated by the employment in a significant manner. Mental disabilities shall be compensable when arising out of actual events of employment, not unfounded perceptions thereof.
