Table 1.

Demographics at the time of birth of all Aboriginal or Torres Strait Islander mothers who gave birth to at least one singleton baby in New South Wales (NSW) between 2010 and 2014 reported for all births and by smoking status during pregnancy

	All births		Non-smoking		Smoking
	n=18 154		Nns=9235 (51%)		Ns=8919 (49%)
	n	%	n	%	n	%
Year of baby’s birth
2010	3487	19	1740	50*	1747	50*
2011	3380	19	1638	48*	1742	52*
2012	3680	20	1833	50*	1847	50*
2013	3716	20	1944	52*	1772	48*
2014	3891	21	2080	53*	1811	47*
Maternal age
Under 20	3214	18	1568	17	1646	19
20–24	6014	33	2983	32	3031	34
25–29	4608	25	2381	26	2227	25
30–34	2729	15	1455	16	1274	14
35 and over	1589	8.8	848	9.2	741	8.3
Total	18 154	100	9235	100	8919	100
Parity
0	6259	35	3720	40	2539	29
1	4709	26	2589	28	2120	24
2	3107	17	1490	16	1617	18
3+	4072	22	1431	16	2641	30
Total	18 147	100	9230	100	8917	100
SEIFA IRSD quintiles†
First—most disadvantaged	4827	27	2131	23	2696	30
Second	3674	20	1887	21	1787	20
Third	5375	30	2806	31	2569	29
Fourth	3068	17	1617	18	1451	16
Fifth—least disadvantaged	1115	6.2	748	8.1	367	4.1
Total	18 059	100	9189	100	8870	100
Remoteness area
Major cities	4193	23	2246	24	1947	22
Inner regional	6147	34	3310	36	2837	32
Outer regional	6097	34	2966	32	3131	35
Remote	1027	5.7	421	4.6	606	6.8
Very remote	595	3.3	245	2.7	350	4.0
Total	18 059	100	9188	100	8871	100
Hospital level
Tertiary	4099	23	2108	23	1991	22
Small and medium urban	308	1.7	178	1.8	130	1.5
Large urban	2895	16	1607	9	1288	14
Small regional	3441	19	1519	16	1922	22
Medium regional	3042	17	1550	17	1492	17
Large regional	3897	21	1896	21	2001	22
Private	336	1.7	323	3.2	13	0.2
Other	136	0.7	54	0.6	82	0.9
Total	18 154	100	9235	100	8919	100
Chronic conditions‡
Yes	343	1.9	147	1.6	196	2.2
Total	18 154	100	9235	100	8919	100
Any hypertension
Yes	1684	9.3	1106	12	578	6.5
Total	18 154	100	9235	100	8919	100
Any diabetes
Yes	1413	7.8	804	8.7	609	6.5
Total	18 154	100	9235	100	8919	100

*Percentage of all births within each year.

†Socio-Economic Index for Areas—Index of Relative Socio-Economic Disadvantage (SEIFA IRSD). When ranking areas within NSW in order of their relative disadvantage, the lowest 20% (most disadvantaged) fall in the first quintile and the highest 20% (least disadvantaged) fall in fifth quartile.

‡Chronic conditions encompasses renal, cardiac, thyroid, asthma, psychiatric, and other autoimmune conditions.⁴⁰