Table 4.

Results of univariate and expanded models where the outcome is self-reported health-related absence from work in the previous 90 days

Demographic Information		Crude Rate Ratio (IRR)	Crude IRR 95% CI	p-value	Adjusted Rate Ratio (IRR)	Adjusted IRR 95% CI	p-value
Industry				< 0.0003
	Retail and Trade
	Agriculture	0.66	(0.46-0.94)	0.02
	Fishing	1.53	(1.23-1.90)	< 0.01
	Electricity, gas & water	1.70	(1.32-2.20)	< 0.01
	Wholesale trade and repair of motor vehicles	1.39	(1.07-1.79)	0.01
	Hotels and Restaurants	1.01	(0.66-1.55)	0.96
	Transport, Storage and Communication	1.20	(0.90-1.59)	0.21
Contract Type
	Permanent
	Part-time/Short-term	0.74	(0.63-0.89)	< 0.001
Job Type
	Labour
	Administration Work	1.03	(0.85-1.24)	0.80
Age
	Age	1.00	(0.99-1.01)	0.97
Sex
	Male
	Female	1.07	(0.90-1.26)	0.41
		Crude Rate	Crude IRR			Adjusted Rate	Adjusted IRR
Risk Factors		Ratio (IRR)	95% CI	p-value	Ratio (IRR)	95% CI	p-value
BMI
	BMI z-score	1.04	(0.96-1.13)	0.32	0.98	(0.90-1.07)	0.72
Waist Circumference
	Normal
	Above limit	1.21	(0.99-1.48)	0.06	1.10	(0.90-1.34)	0.42
Blood Pressure
	Normal (< 140/90 mm/Hg)
	Elevated (140/90-153/103 mm/Hg)	0.75	(0.60-0.92)	0.01	0.74	(0.59-0.91)	0.01
	High (≥ 154/104 mm/Hg)	1.10	(0.84-1.43)	0.50	1.03	(0.78-1.35)	0.85
Smoking Status
	Never smoked
	Smoker	1.09	(0.89-1.34)	0.40	1.15	(0.94-1.42)	0.18
Hypertension
	No
	Yes	1.14	(0.92-1.41)	0.22	1.07	(0.86-1.34)	0.55
Diabetes
	No
	Yes	3.40	(1.91-6.04)	< 0.01	3.67	(2.06-6.55)	< 0.01
Haemoglobin
	Normal
	Anaemia	1.82	(1.35-2.46)	< 0.01	1.59	(1.17-2.18)	< 0.01
HIV
	Negative
	Positive	1.55	(1.18-2.04)	< 0.01	1.47	(1.12-1.95)	0.01
Hepatitis B
	Negative
	Positive	1.01	(0.75-1.37)	0.92	1.14	(0.85-1.55)	0.38
Syphilis
	Negative
	Positive	0.64	(0.31-1.37)	0.22	0.83	(0.40-1.69)	0.60

*adjusted IRR were calculated after controlling for industry, age, sex, job status, and contract type. All IRR were calculated by exponentiating the beta coefficients obtained from negative binomial regression