Exposure to occupational hazards for pregnancy and sick leave in pregnant workers: a cross-sectional study

Table 4 Zero-inflated negative binomial model for number days of sick leave before pathological and legal maternity leaves

	Logistic portion^a				Negative binomial portion
	β^b	95% CI	p	Probability of being an extra zero	β^b	95% CI	p	Adjusted mean NOLD^c	Difference (factor-intercept)^c
Intercept	0.92	−0.08 – 1.91	0.07	0.71	3.46	3.06 – 3.87	<0.001	31.9	0
Number of occupational risks
1 or 2 risks vs 0 risk	−0.44	−0.83 – -0.06	<0.001	0.62	0.19	0.03 – 0.35	<0.001	38.6	+06.7
3 or 4 risks vs 0 risk	−0.74	−1.23 – -0.24		0.54	0.38	0.19 – 0.57		46.8	+14.9
≥ 5 risks vs 0 risk	−1.05	−1.54 – -0.57		0.46	0.52	0.35 – 0.70		53.8	+21.9
Work-family conflict
1 risks vs 0 risk	0.14	−0.23 – 0.52	0.35	0.74	0.20	0.04 – 0.35	0.03	38.8	+6.9
2 risks vs 0 risk	−0.14	−0.60 – 0.32		0.68	0.23	0.06 – 0.39		40.0	+8.1
≥ 3 risks vs 0 risk	−0.33	−0.99 – 0.34		0.64	0.21	0.01 – 0.41		39.4	+7.6
Deprivation (EPICES score ≥ 30)
Yes vs no	−0.17	−0.59 – 0.25	0.42	0.68	0.17	0.04 – 0.31	0.01	37.9	+6.0
Working time
Full-time vs part-time	0.15	−0.24 – 0.53	0.46	0.74	−0.15	−0.29 – -0.01	0.03	27.4	−4.5
Home-work commuting felt as difficult
Yes vs no			<0.001	0.53	0.09	−0.04 – -0.22	0.17	35.0	+3.1
Pregnancy at risk
Yes vs no	−1.26	−1.72 – -0.80	<0.001	0.41	0.42	0.29 – 0.54	<0.001	48.3	+16.5
Company size (workers)
≥ 50 -199 vs ≥ 200	0.64	0.09 – 1.18	0.02	0.68	0.07	−0.12 – 0.25	0.34	34.0	+2.1
10 – 49 vs ≥ 200	0.69	0.17 – 1.20		0.83	0.02	−0.14 – 0.19		32.7	+0.8
< 10 vs ≥ 200	0.29	−0.25 – 0.82		0.77	−0.08	−0.24 – 0.09		29.4	−2.4
Type of contract
Fixed-term vs non-fixed term	−1.03	−1,71 – -0.35	0.003	0.47	0.26	−0.06 – 0.58	0.11	41.2	+9.4

RRa ajusted relative risk, 95% CI 95% confidence intervals, p p-value, NOLD number of sick leave days vs: versus
^aModeling the probability of being an extra zero
^bAjusted for: number of occupational risks (0, 1 or 2, 3 or 4, ≥5 risks), number of home-work conflicts (0, 1, 2, ≥3 risks), deprivation EPICES score ≥ 30 (yes/no), pregnancy at risk (yes/no), working time (full-time, part-time), company size (<10, 10–49, ≥ 50 – 199,≥ 200 workers), type of contract (non-fixed term, fixed term), home-work commuting felt as difficult (yes/no)
^cin days

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