Table 3: Independent t-test for baseline characteristics of the study participants.

Variables	Factory A (N = 201)		Factory B (N = 201)		P value
Variables	Mean	Standard deviation	Mean	Standard deviation	P value
Age of the group	1.49	0.79	2.13	0.93	0.000^**
BMI	22.97	3.18	24.52	3.73	0.000^**
Experience	1.27	0.54	2.07	0.93	0.076
Duration of work in field per week	1.80	0.55	1.70	0.57	0.056
Duration of work in field per day	2.19	0.784	2.36	0.81	0.033^*
Systolic (mmHg)	121.45	10.72	130.89	14.82	0.000^**
Diastolic (mmHg)	76.65	10.32	80.72	9.17	0.000^**

^*Significant association at ^*p ≤ 0.005, ^**p ≤ 0.01, and ^***p ≤ 0.001