Massachusetts employers hit the pause button on a seven-month rally in business confidence during April, but their outlook remained solidly optimistic in the face of mixed political and economic signals.

The Associated Industries of Massachusetts Business Confidence Index (BCI) lost 2.2 points to 60.2 last month, 4.0 points higher than its level of a year earlier. Every constituent element of the confidence index lost ground after reaching a 13-year high during March.

The results came as the Massachusetts economy contracted at a 0.5 percent annual rate during the first quarter and the state unemployment rate rose to 3.6 percent.

“We should not be surprised to see confidence readings correct slightly after advancing six points since September,” said Raymond G. Torto, Chair of AIM’s Board of Economic Advisors (BEA) and Lecturer, Harvard Graduate School of Design.

“It bears watching to determine whether the broad April decline becomes a trend as we move into the summer.”

Analysts believe the numbers may reflect growing concern among employers about the ability of the Trump Administration to deliver the many pro-growth policies it promised during the campaign.

The AIM Index, based on a survey of Massachusetts employers, has appeared monthly since July 1991. It is calculated on a 100-point scale, with 50 as neutral; a reading above 50 is positive, while below 50 is negative. The Index reached its historic high of 68.5 on two occasions in 1997-98, and its all-time low of 33.3 in February 2009.

The index has remained above 50 since October 2013.

Employers grew less confident about both the overall economy and their own operations during April.

The Massachusetts Index, assessing business conditions within the commonwealth, lost 0.4 points to 63.3, leaving it 6 points higher than in April 2016.

The U.S. Index of national business conditions shed 2.7 points after gaining ground for the previous sixth months. April marked the 85th consecutive month in which employers have been more optimistic about the Massachusetts economy than the national economy.

The Current Index, which assesses overall business conditions at the time of the survey, declined 1.9 points to 59.9 while the Future Index, measuring expectations for six months out, dropped 2.5 points to 60.5. The future outlook remained 3.2 points higher than a year ago.

The Company Index, reflecting overall business conditions, fell 2.6 points to 60.2. The Employment Index fell 2.8 points to 56.2, and the Sales Index declined 2.1 points to 60.5.

The AIM survey found that nearly 39 percent of respondents reported adding staff during the past six months while 19 percent reduced employment. Expectations for the next six months were stable ” 37 percent hiring and only 10 percent downsizing.

Barry Bluestone, Stearns Trustee Professor of Political Economy at Northeastern University and a BEA member, noted that the Massachusetts economy is running up against tightness in the labor market that makes it difficult for employers to grow.

“The combination of a prolonged economic recovery and the demographics of skilled workers retiring with no one to replace them is creating an impediment to growth for Massachusetts employers. The shortage underscores once again the importance of creating an education and training system that responds to the demands of the economy,” Bluestone said.

The April survey also reversed an unusual result in March when Western Massachusetts companies were more confident than those in the eastern portion of the commonwealth. Eastern Massachusetts employers posted a 61.7 confidence reading in April versus 58 for employers in the western part of the state.

AIM President and CEO Richard C. Lord, also a BEA member, said employer confidence is also facing headwinds from accelerating health-care and health-insurance costs. Massachusetts has exceeded its objective for health-care spending in each of the past two years and employers continue to pay some of the highest costs in the nation.

“The good news is that Massachusetts is beginning to identify some answers. And there appears to be enough common ground and political will on the issue to pursue some solutions,” Lord said.

“New research conducted by the Massachusetts Health Policy Commission suggests that Massachusetts employers, insurers and policymakers could reduce total health-care expenditures anywhere from $279 million per year to $794 million per year, or 0.5 to 1.3 percent, by making several key improvements to the health-care system.”