Objective

To evaluate criterion validity of the iMTA Productivity Cost Questionnaire (iPCQ) by comparing iPCQ-reported occurrence and duration of long-term absenteeism (> 4 weeks) with public registry data collected from the Norwegian Labour and Welfare Administration (NAV) among people on sick leave due to musculoskeletal disorders.

Method

Baseline data from a cohort study was used, in which people on sick leave for at least 4 weeks due to musculoskeletal disorders were recruited electronically through the NAV website. To compare the occurrence of long-term absenteeism overall agreement between the two methods was measured by percentages. To compare the duration (number of days with absenteeism) and adjusted duration (number of days with complete absenteeism) of long-term absenteeism we conducted intraclass correlation coefficient (ICC) two-way random average agreement, descriptive statistic and Wilcoxon signed-rank test.

Results

In total, 144 participants with a median age (range) of 49 (24–67) were included. The overall agreement on the occurrence of long-term absenteeism was 100%. The ICC value was 0.97 and 0.86 for duration and adjusted duration of long-term absenteeism, respectively. The median difference_{(iPCQ-registry)} between the two methods was 0 and 17 days for long-term absenteeism duration and adjusted duration, respectively. A significant difference between the two methods was observed (Wilcoxon signed-rank test, p < 0.001) with regards to adjusted duration of long-term absenteeism.

Conclusion

The iPCQ showed good agreement with public registry data regarding the occurrence and duration of long-term absenteeism among people with musculoskeletal disorders on long-term sick-leave in Norway. However, the iPCQ does not cover part-time sick-leave and thereby potentially overestimate the total amount of long-term absenteeism.

Trial registration

ClinicalTrials.gov Identifier no. NCT04196634.

中文翻译：

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因肌肉骨骼疾病而长期病假的人员自我报告和公开登记缺勤的比较：iMTA 生产力成本问卷的标准效度

客观的

通过将 iPCQ 报告的长期缺勤（> 4 周）的发生率和持续时间与从挪威劳工和福利管理局 (NAV) 收集的病患人群中的公共登记数据进行比较，评估 iMTA 生产力成本问卷 (iPCQ) 的标准有效性因肌肉骨骼疾病而离开。

方法

使用队列研究的基线数据，其中通过 NAV 网站以电子方式招募因肌肉骨骼疾病请病假至少 4 周的人。为了比较长期旷工的发生，两种方法之间的总体一致性用百分比来衡量。为了比较长期缺勤的持续时间（缺勤天数）和调整后的持续时间（完全缺勤天数），我们进行了班内相关系数 (ICC) 双向随机平均协议、描述性统计和 Wilcoxon 符号秩检验.

结果

总共包括 144 名中位年龄（范围）为 49 岁（24-67 岁）的参与者。长期缺勤发生率的总体一致性为 100%。长期缺勤持续时间和调整后的长期缺勤持续时间的 ICC 值分别为 0.97 和 0.86。对于长期缺勤持续时间和调整持续时间，两种方法之间的中位数差异_{（iPCQ-registry）}分别为 0 天和 17 天。 在调整后的长期缺勤持续时间方面，观察到两种方法之间的显着差异（Wilcoxon 符号秩检验，p < 0.001）。

结论

iPCQ 与挪威长期病假的肌肉骨骼疾病患者长期缺勤的发生和持续时间的公共登记数据非常吻合。但是，iPCQ 不包括兼职病假，因此可能高估了长期缺勤的总数。

试用注册

ClinicalTrials.gov 标识符号。NCT04196634。