Table 1. Summary characteristics of the included studies to estimate the prevalence and associated factors of respiratory symptoms in Ethiopia, 2014–2022 (n = 15).

Author	Year	Region	Sample size	Type of factory	Study design	Response rate (%)	NOQS
Alemseged et al. [33]	2020	Addis Ababa	415	Flour	Cross-sectional	97.9	10
Demeke and Haile [34]	2018	Addis Ababa	54	Flour	Cross-sectional	100	7
Mekonnen et al. [37]	2021	Amhara	280	Flour	Cross-sectional	100	9
Lagiso et al. [42]	2020	SNNPR	196	Flour	Cross-sectional	93.3	8
Kanko et al. [41]	2017	SNNPR	51	Textile	Cross-sectional	99.7	7
Zele et al. [38]	2020	Amhara	303	Textile	Cross-sectional	100	10
Daba Wami et al. [39]	2018	Amhara	270	Textile	Cross-sectional	99	8
Reta Demissie [43]	2019	Oromia	70	Wood	Cross-sectional	97.8	7
Jabur et al. [36]	2022	Addis Abeba	230	Wood	Cross-sectional	100	8
Awoke et al. [26]	2021	Addis Abeba	496	Wood	Cross-sectional	99.1	10
Meskele et al. [35]	Unpublished	Addis Abeba	206	Paper	Cross-sectional	98	7
Kifle et al. [25]	2020	Amhara	383	Cement	Cross-sectional	91.7	9
Gizaw et al. [40]	2016	Amhara	404	Cement	Cross-sectional	100	10
Siyoum et al. [44]	2014	Oromia	266	Cement	Cross-sectional	97.8	8
Mekasha et al. [45]	2018	Oromia	309	Cement	Cross-sectional	97	8

NOQS: Newcastle Ottawa Quality Score, SNNP: Southern Nations, Nationalities, and Peoples.